Edit Profile (opens in new tab) El-Sayed, Ahmed Mohamed Ahmed Co-Author Distance Author ID: el-sayed.ahmed-mohamed-ahmed Published as: El-Sayed, A. M. A.; El-Sayed, Ahmed M. A.; El-Sayed, Ahmed; El-Sayed, Ahmed Mohamed Ahmed; El-Sayed, Ahmed Mohamed; EL-Sayed, Ahmed M. A.; El-Sayed, Ahmed M.; El-Sayed, A. M. A; El-Sayed, A. M. more...less Homepage: http://www.ahmed-el-sayed.8m.com/custom2.html External Links: ORCID Documents Indexed: 209 Publications since 1987 Reviewing Activity: 98 Reviews Co-Authors: 75 Co-Authors with 164 Joint Publications 1,952 Co-Co-Authors all top 5 Co-Authors 25 single-authored 21 Hashem, Hind H. G. 13 Al-Issa, Shorouk Mahmoud 11 Gaafar, Fatma M. 9 El-Saka, Hala A. A. 9 Elsaid, Ahmed 9 Hamdallah, Eman M. A. 9 Rida, Saad Zagloul 8 Arafa, Anas. A. M. 8 Elsonbaty, Amr R. 7 Bin-Taher, Ebtisam O. 7 Nour, Hamed Mohamed 6 Ahmed, Eshag Mohamed 6 Ebead, Hanaa Rezqalla 6 El-Sayed, Wagdy Gomaa 6 Herzallah, Mohamed A. E. 6 Ziada, E. A. A. 5 El-Gendy, M. E. I. 5 Elkadeky, Kh. W. 4 Abdel-Rehim, Entsar A. 4 Ahmed, Reda Gamal 4 Al-Fadel, Masouda M. A. 4 El-Mesiry, A. E. M. 4 El-Raheem, Zaki F. A. 4 El-Salam, Sh. A. Abd 4 Hashem, Hind Hassan Gaber 4 Matouk, Ahmed Ezzat 3 Abd El-Mowla, A. A. H. 3 Abd El Rahman, R. O. 3 Buhalima, N. A. O. 3 El-Haddad, Nesreen F. M. 3 Moustafa, Osama L. 3 Nasr, Mohamed E. 3 Omar, Yasmin M. Y. 3 Raslan, W. E. 3 Salem, Hussein A. H. 3 Sherif, Nagwa 2 Abd El-Salam, Sheren Ahmed 2 Ba-Ali, Malak M. S. 2 Băleanu, Dumitru I. 2 Behiry, S. H. 2 El-Farag, Ibrahim Abou 2 El-Kalla, Ibrahim L. 2 Eladdad, E. E. 2 Hagag, Ahmed. M. Sh. 2 Hammad, D. A. 2 Hashem, A. S. 2 Hassan, R. M. 2 Helal, Shaimaa M. 2 Madkour, H. F. A. 2 Radwan, Moamen Osama 2 Salman, Sanaa Moussa 1 Agarwal, Ravi P. 1 Ahmad, Bashir 1 Al-Amri, Ahmed Hind 1 Alenizi, Maha A. 1 Alfadel, Masouda 1 Aly, Mohamed A. E. 1 Cichoń, Mieczysław 1 El-Azab, M. S. 1 El-Latief, A. M. Abd 1 El-Maghrabi, E. M. 1 El-Owaidy, Hassan Mostafa 1 El-Sayed, Magdy A. 1 El-Shazly, E. S. 1 El-Sherbeny, D. El. A. 1 El-Tawil, Magdi A. 1 El-Tawil, Magdy A. 1 Elsadany, Abdelalim A. 1 Gaber, Y. A. 1 Gaffar, Fatma F. M. 1 Gama, Reda 1 Gamal, Reda 1 Grimble, Michael John 1 Gürlebeck, Klaus 1 Hafez, Fathy M. 1 Hafiz, Fathi M. 1 Hamadalla, Eman M. A. 1 Hijazi, Mohd Hanafi Ahmad 1 Hussien, A. H. 1 Kamal, Alaa 1 Kenawy, Mohammed R. 1 Khouni, Yassine 1 Kishka, Z. M. G. 1 Mohamed, F. F. S. 1 Nasim, Shaymaa I. 1 Saif, Mahmoud S. M. 1 Shehata, M. I. 1 Sherief, Hany H. 1 Srivastava, Hari Mohan 1 Yassen, Taha Ibrahim all top 5 Serials 16 Applied Mathematics and Computation 13 Journal of Fractional Calculus and Applications 10 Electronic Journal of Mathematical Analysis and Applications EJMAA 8 Differentsial’nye Uravneniya i Protsessy Upravleniya 8 Advances in Difference Equations 7 Kyungpook Mathematical Journal 7 Electronic Journal of Qualitative Theory of Differential Equations 6 Mathematical Sciences Research Journal 4 Annales Societatis Mathematicae Polonae. Seria I. Commentationes Mathematicae 4 Journal of Fractional Calculus 4 Computational and Applied Mathematics 4 Fixed Point Theory 4 International Journal of Nonlinear Science 4 Commentationes Mathematicae 4 Fractional Differential Calculus 3 Electronic Journal of Differential Equations (EJDE) 3 PU.M.A. Pure Mathematics and Applications 3 Methods of Functional Analysis and Topology 3 Nonlinear Dynamics 3 Abstract and Applied Analysis 3 Communications in Nonlinear Science and Numerical Simulation 3 Journal of Mathematics and Applications 3 Applied Analysis and Optimization 2 Computers & Mathematics with Applications 2 Journal of Mathematical Analysis and Applications 2 Physics Letters. A 2 Chaos, Solitons and Fractals 2 Bulletin of the Faculty of Science. C. Mathematics 2 Applied Mathematical Modelling 2 Fractional Calculus & Applied Analysis 2 Miskolc Mathematical Notes 2 International Journal of Mathematical Analysis (Ruse) 2 Tbilisi Mathematical Journal 2 Journal of Nonlinear Science and Applications 2 Differential Equations and Applications 2 American Academic & Scholarly Research Journal 2 Journal of Applied Analysis and Computation 2 Malaya Journal of Matematik 2 International Journal of Applied and Computational Mathematics 2 AIMS Mathematics 1 Applicable Analysis 1 International Journal of Solids and Structures 1 International Journal of Theoretical Physics 1 Journal of Statistical Physics 1 Mathematical Methods in the Applied Sciences 1 Periodica Mathematica Hungarica 1 Demonstratio Mathematica 1 Mathematische Nachrichten 1 Mathematica Slovaca 1 Studia Scientiarum Mathematicarum Hungarica 1 Acta Applicandae Mathematicae 1 Applied Numerical Mathematics 1 Numerical Methods for Partial Differential Equations 1 Applied Mathematics Letters 1 IEEE Transactions on Acoustics, Speech, and Signal Processing 1 Journal of Physics A: Mathematical and General 1 International Journal of Bifurcation and Chaos in Applied Sciences and Engineering 1 Romanian Journal of Physics 1 Journal of the Egyptian Mathematical Society 1 Filomat 1 Complexity 1 The Korean Journal of Computational & Applied Mathematics 1 International Journal of Modern Physics C 1 Nonlinear Analysis. Modelling and Control 1 Journal of Applied Mathematics 1 Acta Mathematica Scientia. Series B. (English Edition) 1 Journal of Applied Mathematics and Computing 1 Journal of the Indonesian Mathematical Society 1 International Journal of Evolution Equations 1 Boundary Value Problems 1 Optimization Letters 1 Surveys in Mathematics and its Applications 1 International Journal of Mathematical Modeling, Simulation and Applications 1 Communications in Theoretical Physics 1 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 1 Advances in Pure Mathematics 1 Journal of Nonlinear Analysis and Optimization: Theory & Applications 1 Journal of the International Mathematical Virtual Institute 1 Journal of Function Spaces 1 Journal of Mathematical Modeling 1 Nonlinear Analysis. Theory, Methods & Applications 1 Sahand Communications in Mathematical Analysis 1 Open Mathematics all top 5 Fields 109 Ordinary differential equations (34-XX) 69 Integral equations (45-XX) 68 Real functions (26-XX) 40 Operator theory (47-XX) 30 Partial differential equations (35-XX) 17 Numerical analysis (65-XX) 11 Dynamical systems and ergodic theory (37-XX) 10 Difference and functional equations (39-XX) 9 Biology and other natural sciences (92-XX) 8 Probability theory and stochastic processes (60-XX) 6 Systems theory; control (93-XX) 5 Special functions (33-XX) 4 Functional analysis (46-XX) 4 Information and communication theory, circuits (94-XX) 3 Functions of a complex variable (30-XX) 3 Several complex variables and analytic spaces (32-XX) 3 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 2 Measure and integration (28-XX) 2 Calculus of variations and optimal control; optimization (49-XX) 2 Mechanics of particles and systems (70-XX) 1 Mathematical logic and foundations (03-XX) 1 Number theory (11-XX) 1 Harmonic analysis on Euclidean spaces (42-XX) 1 Mechanics of deformable solids (74-XX) 1 Quantum theory (81-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 154 Publications have been cited 2,368 times in 1,677 Documents Cited by ▼ Year ▼ Equilibrium points, stability and numerical solutions of fractional-order predator-prey and rabies models. Zbl 1105.65122 Ahmed, E.; El-Sayed, A. M. A.; El-Saka, H. A. A. 285 2007 On some Routh-Hurwitz conditions for fractional order differential equations and their applications in Lorenz, Rössler, Chua and Chen systems. Zbl 1142.30303 Ahmed, E.; El-Sayed, A. M. A.; El-Saka, Hala A. A. 163 2006 Nonlinear functional differential equations of arbitrary orders. Zbl 0934.34055 El-Sayed, Ahmed M. A. 147 1998 On the fractional-order logistic equation. Zbl 1140.34302 El-Sayed, A. M. A.; El-Mesiry, A. E. M.; El-Saka, H. A. A. 136 2007 Fractional order theory of thermoelasticity. Zbl 1183.74051 Sherief, Hany H.; El-Sayed, A. M. A.; El-Latief, A. M. Abd 129 2010 Fractional-order diffusion-wave equation. Zbl 0846.35001 El-Sayed, Ahmed M. A. 123 1996 The Adomian decomposition method for solving partial differential equations of fractal order in finite domains. Zbl 1236.35003 El-Sayed, A. M. A.; Gaber, M. 87 2006 Multivalued fractional differential equations. Zbl 0830.34012 El-Sayed, A. M. A.; Ibrahim, A. G. 73 1995 Numerical methods for multi-term fractional (arbitrary) orders differential equations. Zbl 1062.65073 El-Mesiry, A. E. M.; El-Sayed, A. M. A.; El-Saka, H. A. A. 64 2005 Exact solutions of fractional-order biological population model. Zbl 1184.92038 El-Sayed, A. M. A.; Rida, S. Z.; Arafa, A. A. M. 62 2009 Adomian’s decomposition method for solving an intermediate fractional advection-dispersion equation. Zbl 1189.35358 El-Sayed, A. M. A.; Behiry, S. H.; Raslan, W. E. 57 2010 Numerical solution for multi-term fractional (arbitrary) orders differential equations. Zbl 1213.34025 El-Sayed, A. M. A.; El-Mesiry, A. E. M.; El-Saka, H. A. A. 42 2004 On the solutions of time-fractional reaction-diffusion equations. Zbl 1222.65115 Rida, S. Z.; El-Sayed, A. M. A.; Arafa, A. A. M. 41 2010 Fractional order evolution equations. Zbl 0839.34069 El-Sayed, A. M. A. 36 1995 On stability, persistence, and Hopf bifurcation in fractional order dynamical systems. Zbl 1175.37084 El-Saka, H. A.; Ahmed, E.; Shehata, M. I.; El-Sayed, A. M. A. 35 2009 On the fractional differential equations. Zbl 0757.34005 El-Sayed, A. M. A. 33 1992 Dynamical behaviors, circuit realization, chaos control, and synchronization of a new fractional order hyperchaotic system. Zbl 1459.34140 El-Sayed, A. M. A.; Nour, H. M.; Elsaid, A.; Matouk, A. E.; Elsonbaty, A. 30 2016 Solution of the \(H_{\infty}\) optimal linear filtering problem for discrete-time systems. Zbl 0712.93053 Grimble, Michael J.; El Sayed, Ahmed 27 1990 Effect of bacterial memory dependent growth by using fractional derivatives reaction-diffusion chemotactic model. Zbl 1197.92007 Rida, S. Z.; El-Sayed, A. M. A.; Arafa, A. A. M. 26 2010 Analytical and numerical solutions of multi-term nonlinear fractional orders differential equations. Zbl 1192.65092 El-Sayed, A. M. A.; El-Kalla, I. L.; Ziada, E. A. A. 25 2010 A homotopy perturbation technique for solving partial differential equations of fractional order in finite domains. Zbl 1245.65141 El-Sayed, A. M. A.; Elsaid, A.; El-Kalla, I. L.; Hammad, D. 25 2012 A note on the fractional calculus in Banach spaces. Zbl 1086.45004 Salem, Hussein A. H.; El-Sayed, A. M. A.; Moustafa, O. L. 24 2005 Set-valued integral equations of fractional-orders. Zbl 1024.45003 El-Sayed, Ahmed M. A.; Ibrahim, A.-G. 23 2001 Integrable and continuous solutions of a nonlinear quadratic integral equation. Zbl 1178.45008 El-Sayed, A. M. A.; Hashem, H. H. G. 18 2008 Further nonlinear dynamical analysis of simple jerk system with multiple attractors. Zbl 1372.37096 Elsonbaty, Amr R.; El-Sayed, A. M. A. 18 2017 On the solutions of time-fractional bacterial chemotaxis in a diffusion gradient chamber. Zbl 1394.35236 El-Sayed, A. M. A.; Rida, S. Z.; Arafa, A. A. M. 18 2009 Dynamical analysis and circuit simulation of a new fractional-order hyperchaotic system and its discretization. Zbl 1354.34081 El-Sayed, A. M. A.; Elsonbaty, A.; Elsadany, A. A.; Matouk, A. E. 18 2016 Picard and Adomian methods for quadratic integral equation. Zbl 1208.45007 El-Sayed, A. M. A; Hashem, H. H. G; Ziada, E. A. A 17 2010 Positive solutions for a nonlocal multi-point boundary-value problem of fractional and second order. Zbl 1291.34009 El-Sayed, Ahmed M. A.; Bin-Taher, Ebtisam O. 17 2013 Existence and uniqueness of solution for Sturm-Liouville fractional differential equation with multi-point boundary condition via Caputo derivative. Zbl 1458.34015 El-Sayed, Ahmed M. A.; Gaafar, Fatma M. 16 2019 Numerical solution for the fractional replicator equation. Zbl 1080.65536 Ahmed, E.; El-Sayed, A. M. A.; El-Mesiry, A. E. M.; El-Saka, H. A. A. 15 2005 Linear differential equations of fractional orders. Zbl 0772.34013 El-Sayed, A. M. A. 15 1993 Fractional differential-difference equations. Zbl 0888.34060 El-Sayed, Ahmed M. A. 15 1996 Existence theorems for nonlinear functional integral equations of fractional orders. Zbl 1011.45002 Cichoń, Mieczysław; El-Sayed, A. M.; Hussien, A. H. 15 2001 Fractional differential equations. Zbl 0709.34011 El-Sayed, A. M. A. 15 1988 Picard and Adomian decomposition methods for a quadratic integral equation of fractional order. Zbl 1308.26010 El-Sayed, A. M. A.; Hashem, H. H. G.; Ziada, E. A. A. 14 2014 On the fractional-order diffusion-wave process. Zbl 1231.35098 Herzallah, Mohamed A. E.; El-Sayed, Ahmed M. A.; Baleanu, Dumitru 14 2010 Weak solution for fractional order integral equations in reflexive Banach spaces. Zbl 1111.26011 Salem, Hussein A. H.; El-Sayed, Ahmed M. A. 13 2005 Numerical and analytic solution for nonlinear quadratic integral equations. Zbl 1173.26304 El-Sayed, A. M. A.; Saleh, M. M.; Ziada, E. A. A. 13 2008 Monotonic positive solution of a nonlinear quadratic functional integral equation. Zbl 1206.45006 El-Sayed, A. M. A.; Hashem, H. H. G. 13 2010 Dynamical behavior, chaos control and synchronization of a memristor-based ADVP circuit. Zbl 1305.94120 El-Sayed, A. M. A.; Elsaid, A.; Nour, H. M.; Elsonbaty, A. 13 2013 Integrable solutions for quadratic Hammerstein and quadratic Urysohn functional integral equations. Zbl 1195.45012 El-Sayed, A. M. A.; Hashem, H. H. G. 12 2008 Circuit realization, bifurcations, chaos and hyperchaos in a new 4D system. Zbl 1334.37029 El-Sayed, A. M. A.; Nour, H. M.; Elsaid, A.; Matouk, A. E.; Elsonbaty, A. 12 2014 On the maximal and minimal solutions of arbitrary-orders nonlinear functional integral and differential equations. Zbl 1068.45008 El-Sayed, Ahmed M. A.; Gaafar, Fatma M.; Hashem, Hind H. G. 12 2004 On the solutions of the generalized reaction-diffusion model for bacterial colony. Zbl 1191.35097 El-Sayed, A. M. A.; Rida, S. Z.; Arafa, A. A. M. 11 2010 Dynamic properties of the fractional-order logistic equation of complex variables. Zbl 1246.37074 El-Sayed, A. M. A.; Ahmed, E.; El-Saka, H. A. A. 11 2012 Discretization of forced Duffing system with fractional-order damping. Zbl 1417.34009 El-Sayed, Ahmed M. A.; El-Raheem, Zaki F. E.; Salman, Sanaa M. 11 2014 On the functional integral equations of mixed type and integro-differential equations of fractional orders. Zbl 1061.45004 El-Sayed, Wagdy G.; El-Sayed, Ahmed M. A. 11 2004 On the stochastic fractional calculus operators. Zbl 1499.60168 El-Sayed, Ahmed M. A. 10 2015 On a stochastic fractional calculus. Zbl 1034.60054 Hafez, Fathy M.; El-Sayed, Ahmed M. A.; El-Tawil, Magdy A. 10 2001 Fractional-order differential equations with memory and fractional-order relaxation-oscillation model. Zbl 1006.34008 El-Sayed, Ahmed M. A.; Gaafar, Fatma M. 10 2002 Fractional calculus and some intermediate physical processes. Zbl 1049.35002 El-Sayed, Ahmed M. A.; Gaafar, Fatma M. 10 2003 Fractional-order evolutionary integral equations. Zbl 0933.34063 El-Sayed, Ahmed M. A. 10 1999 A reliable treatment of homotopy perturbation method for solving the nonlinear Klein-Gordon equation of arbitrary (fractional) orders. Zbl 1235.65148 El-Sayed, A. M. A.; Elsaid, A.; Hammad, D. 10 2012 Existence results for coupled systems of quadratic integral equations of fractional orders. Zbl 1272.93068 El-Sayed, A. M. A.; Hashem, H. H. G. 9 2013 Continuation theorem of fractional order evolutionary integral equations. Zbl 1011.34047 El-Sayed, Ahmed M. A.; Aly, Mohamed A. E. 9 2002 On the stability of a fractional-order differential equation with nonlocal initial condition. Zbl 1183.34006 El-Sayed, A. M. A.; El-Salam, Sh. A. Abd 8 2008 \(L_p\)- solution of weighted Cauchy-type problem of a differ-integral functional equation. Zbl 1230.34006 El-Sayed, A. M. A.; El-Salam, Sh. A. Abd 8 2008 On some fractional functional equations. Zbl 0867.49001 El-Sayed, Ahmed M. A.; El-Sayed, Wagdy G.; Moustafa, Osama L. 8 1995 Simulation of the approximate solutions of the time-fractional multi-term wave equations. Zbl 1409.35207 Abdel-Rehim, E. A.; El-Sayed, A. M. A.; Hashem, A. S. 8 2017 Monotonic solutions of functional integral and differential equations of fractional order. Zbl 1181.45016 El-Sayed, A. M. A.; Hashem, H. H. G. 7 2009 Exact solution of linear differential equations of fractional order. Zbl 0895.34003 El-Sayed, A. M. A.; Gaafar, F. M. 7 1997 Solvability of coupled systems of fractional order integro-differential equations. Zbl 1312.45008 Hashem, H. H. G.; El-Sayed, A. M. A. 7 2013 Carathéodory type theorem for a nonlinear quadratic integral equation. Zbl 1161.45005 El-Sayed, A. M. A.; Hashem, H. H. G. 6 2008 Weighted Cauchy-type problem of a functional differ-integral equation. Zbl 1182.34004 El-Sayed, A. M. A.; El-Salam, Sh. A. Abd 6 2007 The mean square Riemann-Liouville stochastic fractional derivative and stochastic fractional order differential equation. Zbl 1083.60026 El-Sayed, Ahmed; El-Sayed, Magdy A.; El-Tawil, Magdi A.; Saif, Mahmoud S. M.; Hafiz, Fathi M. 6 2005 Continuation and maximal regularity of an arbitrary (fractional) order evolutionary integro-differential equation. Zbl 1096.45011 El-Sayed, Ahmed M. A.; Herzallah, Mohamed A. E. 6 2005 Infinite point and Riemann-Stieltjes integral conditions for an integro-differential equation. Zbl 1478.34076 El-Sayed, Ahmed; Gamal, Reda 6 2019 Continuous dependence of the solution of random fractional-order differential equation with nonlocal conditions. Zbl 1438.34028 El-Sayed, A. M. A.; Gaafar, F.; El-Gendy, M. 6 2017 A nonlocal problem for a multi-term fractional-order differential equation. Zbl 1243.34004 El-Sayed, A. M. A.; Bin-Taher, E. O. 6 2011 Solutions of a class of deviated-advanced nonlocal problems for the differential inclusion \(x'(t)\in F(t,x(t))\). Zbl 1222.34076 El-Sayed, A. M. A.; Hamdallah, E. M.; Elkadeky, Kh. W. 5 2011 Definite integral of fractional order for set-valued functions. Zbl 0894.26001 Ibrahim, A.-G.; El-Sayed, Ahmed M. A. 5 1997 Finite Weyl fractional calculus and abstract fractional differential equations. Zbl 0862.34010 El-Sayed, Ahmed M. A. 5 1996 Perturbation for fractional-order evolution equation. Zbl 1209.34003 Herzallah, Mohamed A. E.; El-Sayed, Ahmed M. A.; Baleanu, Dumitru 5 2010 Continuous solutions of some fractional order integral equations. Zbl 1033.45003 Salem, Hussein A. H.; El-Sayed, Ahmed M. A.; Moustafa, O. L. 5 2002 Bell polynomials of arbitrary (fractional) orders\(+\). Zbl 1022.33007 El-Sayed, A. M. A.; Rida, S. Z. 5 1999 Nonlocal boundary value problem of a fractional-order functional differential equation. Zbl 1394.34046 El-Sayed, A. M. A.; Abd El-Salam, Sh. A. 5 2009 Continuation and maximal regularity of fractional-order evolution equation. Zbl 1149.34336 El-Sayed, Ahmed M. A.; Herzallah, Mohamed A. E. 5 2004 Positive solutions of singular Hadamard-type fractional differential equations with infinite-point boundary conditions or integral boundary conditions. Zbl 1459.34076 El-Sayed, A. M. A.; Gaafar, F. M. 5 2019 Existence of solutions for a functional integro-differential equation with infinite point and integral conditions. Zbl 1437.45007 El-Sayed, A. M. A.; Ahmed, Reda Gamal 5 2019 Analytical investigation of nonlinear hybrid implicit functional differential inclusions of arbitrary fractional orders. Zbl 1487.34041 Srivastava, H. M.; El-Sayed, A. M. A.; Hashem, H. H. G.; Al-Issa, Sh. M. 5 2022 A coupled system of fractional order integral equations in reflexive Banach spaces. Zbl 1300.45001 El-Sayed, A. M. A.; Hashem, H. H. G. 5 2012 On the effectiveness of basic sets of polynomials of several complex variables in elliptical regions. Zbl 1152.32300 Kishka, Z. M. G.; El-Sayed, Ahmed 4 2003 Laguerre polynomials of arbitrary (fractional) orders. Zbl 1049.33005 El-Sayed, Ahmed M. A. 4 2000 On the stability of some fractional-order non-autonomous systems. Zbl 1115.34047 Abd El-Salam, Sheren A.; El-Sayed, Ahmed M. A. 4 2007 Existence results for nonlinear quadratic integral equations of fractional order in Banach algebra. Zbl 1312.45004 El-Sayed, Ahmed; Hashem, Hind 4 2013 Stabilization of coupled systems of quadratic integral equations of Chandrasekhar type. Zbl 1368.45001 Hashem, H. H. G.; El-Sayed, A. M. A. 4 2017 Weak maximal and minimal solutions for Hammerstein and Urysohn integral equations in reflexive Banach spaces. Zbl 1458.45002 El-Sayed, A. M. A.; Hashem, H. H. G. 4 2008 Solvability of a coupled system of functional integro-differential equations with infinite point and Riemann-Stieltjes integral conditions. Zbl 1445.45012 El-Sayed, A. M. A.; Ahmed, Reda Gamal 4 2020 On the fractional-order games with non-uniform interaction rate and asymmetric games. Zbl 1488.34030 El-Sayed, A. M. A.; Ahmed, E.; Herzallah, M. A. E. 4 2011 Existence of positive continuous solution of a quadratic integral equation of fractional orders. Zbl 1488.45007 El-Sayed, A. M. A.; Mohamed, M. Sh.; Mohamed, F. F. S. 4 2011 A fractional Temimi-Ansari method (FTAM) with convergence analysis for solving physical equations. Zbl 1473.35474 Arafa, Anas A. M.; El-Sayed, Ahmed M. A.; Hagag, Ahmed M. Sh. 4 2021 A coupled system of integral equations in reflexive Banach spaces. Zbl 1274.45016 El-Sayed, A. M. A.; Hashem, H. H. G. 4 2012 Stability for a non-local non-autonomous system of fractional order differential equations with delays. Zbl 1188.34107 El-Sayed, Ahmed M. A.; Gaafar, Fatma M.; Hamadalla, Eman M. A. 3 2010 Positive integrable solutions for nonlinear integral and differential inclusions of fractional-orders. Zbl 1228.26010 Al-Issa, Shorouk; El-Sayed, Ahmed Mohamed Ahmed 3 2009 A numerical algorithm for the solution of an intermediate fractional advection dispersion equation. Zbl 1221.35438 El-Sayed, A. M. A.; Behiry, S. H.; Raslan, W. E. 3 2010 Stability of a monotonic solution of a non-autonomous multidimensional delay differential equation of arbitrary (fractional) order. Zbl 1183.34125 El-Sayed, A. M. A.; El-Maghrabi, E. M. 3 2008 Analytical and numerical solution of multi-term nonlinear differential equations of arbitrary orders. Zbl 1204.34006 El-Sayed, A. M. A.; Saleh, M. M.; Ziada, E. A. A. 3 2010 Monotonic solutions for a quadratic integral equation of fractional order. Zbl 1484.45006 El-Sayed, A. M. A.; Al-Issa, Sh. M. 3 2019 Stability of a nonlinear non-autonomous fractional order systems with different delays and non-local conditions. Zbl 1272.34106 El-Sayed, Ahmed; Gaafar, Fatma 3 2011 On the pantograph functional equation. Zbl 07906607 Ba-Ali, Malak M. S.; El-Sayed, Ahmed M. A.; Hamdallah, Eman M. A. 2 2024 Analytical investigation of nonlinear hybrid implicit functional differential inclusions of arbitrary fractional orders. Zbl 1487.34041 Srivastava, H. M.; El-Sayed, A. M. A.; Hashem, H. H. G.; Al-Issa, Sh. M. 5 2022 Study on the stability for implicit second-order differential equation via integral boundary conditions. Zbl 1538.34039 El-Sayed, Ahmed Mohamed Ahmed; Hashem, Hind Hassan Gaber; Al-Issa, Shorouk Mahmoud 2 2022 Analytical study of some self-referred or state dependent functional equations. Zbl 1513.34314 El-Sayed, Ahmed M. A.; Hashem, Hind H. G.; Al-Issa, Shorouk M. 1 2022 Analysis of a hybrid integro-differential inclusion. Zbl 1522.45006 El-Sayed, Ahmed; Hashem, Hind; Al-Issa, Shorouk 1 2022 A fractional Temimi-Ansari method (FTAM) with convergence analysis for solving physical equations. Zbl 1473.35474 Arafa, Anas A. M.; El-Sayed, Ahmed M. A.; Hagag, Ahmed M. Sh. 4 2021 On Chandrasekhar functional integral inclusion and Chandrasekhar quadratic integral equation via a nonlinear Urysohn-Stieltjes functional integral inclusion. Zbl 1494.45007 El-Sayed, Ahmed; Al-Issa, Shorouk; Omar, Yasmin 1 2021 On set-valued functional integral equations of Hammerstein-Stieltjes type: existence of solutions, continuous dependence, and applications. Zbl 1524.45004 El-Sayed, Ahmed M. A.; Al-Issa, Shorouk M. 1 2021 Chandrasekhar quadratic and cubic integral equations via Volterra-Stieltjes quadratic integral equation. Zbl 1475.45008 El-Sayed, Ahmed M. A.; Omar, Yasmin M. Y. 1 2021 On simulating the short and long memory of ergodic Markov and non-Markov genetic diffusion processes on the long run. Zbl 1496.60028 Abdel-Rehim, E. A.; Hassan, R. M.; El-Sayed, A. M. A. 1 2021 Markov and non-Markov hereditary processes in asexual and random mating sexual populations. Zbl 1513.92047 Abdel-Rehim, E. A.; Hassan, R. M.; El-Sayed, A. M. A. 1 2021 Existence results for a functional integro-differential inclusions with Riemann-Stieltjes integral or infinite-point boundary conditions. Zbl 1499.34125 El-Sayed, A. M. A.; Al-Issa, Sh. M.; Hijazi, M. H. 1 2021 Solvability of a coupled system of functional integro-differential equations with infinite point and Riemann-Stieltjes integral conditions. Zbl 1445.45012 El-Sayed, A. M. A.; Ahmed, Reda Gamal 4 2020 Dynamical of curative and preventive treatments in a two-stage plant disease model of fractional order. Zbl 1489.92151 El-Sayed, A. M. A.; Rida, S. Z.; Gaber, Y. A. 3 2020 On the existence of solutions of a set-valued functional integral equation of Volterra-Stieltjes type and some applications. Zbl 1487.45014 El-Sayed, Ahmed Mohamed; Al-Issa, Shorouk Mahmoud 2 2020 On the solutions of a delay functional integral equation of Volterra-Stieltjes type. Zbl 1459.45003 El-Sayed, A. M. A.; Omar, Y. M. Y. 2 2020 On the solvability of a self-reference functional and quadratic functional integral equations. Zbl 1499.32020 El-Sayed, Ahmed M. A.; Ebead, Hanaa R. 2 2020 Existence of solutions for an ordinary second-order hybrid functional differential equation. Zbl 1485.34079 El-Sayed, Ahmed; Hashem, Hind; Al-Issa, Shorouk 2 2020 Existence results for a quadratic integral equation of fractional order by a certain function. Zbl 1474.47109 Hashem, H. H. G.; El-Sayed, A. M. A. 1 2020 Existence and uniqueness of solution for Sturm-Liouville fractional differential equation with multi-point boundary condition via Caputo derivative. Zbl 1458.34015 El-Sayed, Ahmed M. A.; Gaafar, Fatma M. 16 2019 Infinite point and Riemann-Stieltjes integral conditions for an integro-differential equation. Zbl 1478.34076 El-Sayed, Ahmed; Gamal, Reda 6 2019 Positive solutions of singular Hadamard-type fractional differential equations with infinite-point boundary conditions or integral boundary conditions. Zbl 1459.34076 El-Sayed, A. M. A.; Gaafar, F. M. 5 2019 Existence of solutions for a functional integro-differential equation with infinite point and integral conditions. Zbl 1437.45007 El-Sayed, A. M. A.; Ahmed, Reda Gamal 5 2019 Monotonic solutions for a quadratic integral equation of fractional order. Zbl 1484.45006 El-Sayed, A. M. A.; Al-Issa, Sh. M. 3 2019 On an integro-differential equation of arbitrary (fractional) orders with nonlocal integral and infinite-point boundary conditions. Zbl 1474.45051 El-Owaidy, H.; El-Sayed, A. M. A.; Ahmed, Reda Gamal 1 2019 Existence of solution for a coupled system of Urysohn-Stieltjes functional integral equations. Zbl 1474.45040 El-Sayed, A. M. A.; Al-Fadel, M. M. A. 3 2018 Weak solutions of a coupled system of Urysohn-Stieltjes functional (delayed) integral equations. Zbl 1405.45006 El-Sayed, A. M. A.; Al-Fadel, M. M. A. 2 2018 Solvability of Urysohn-Stieltjes integral equation in reflexive Banach space. Zbl 1474.45036 El-Sayed, A. M. A.; Al-Fadel, M. M. A. 1 2018 On a coupled system of Urysohn-Stieltjes integral equations in reflexive Banach space. Zbl 1486.45010 El-Sayed, Ahmed M. A.; Al-Fadel, Masouda M. A. 1 2018 Further nonlinear dynamical analysis of simple jerk system with multiple attractors. Zbl 1372.37096 Elsonbaty, Amr R.; El-Sayed, A. M. A. 18 2017 Simulation of the approximate solutions of the time-fractional multi-term wave equations. Zbl 1409.35207 Abdel-Rehim, E. A.; El-Sayed, A. M. A.; Hashem, A. S. 8 2017 Continuous dependence of the solution of random fractional-order differential equation with nonlocal conditions. Zbl 1438.34028 El-Sayed, A. M. A.; Gaafar, F.; El-Gendy, M. 6 2017 Stabilization of coupled systems of quadratic integral equations of Chandrasekhar type. Zbl 1368.45001 Hashem, H. H. G.; El-Sayed, A. M. A. 4 2017 Volterra-Stieltjes integral equation in reflexive Banach spaces. Zbl 1376.45013 El-Sayed, A. M. A.; El-Sayed, W. G.; Abd El-Mowla, A. A. H. 2 2017 Weak solutions of fractional order differential equations via Volterra-Stieltjes integral operator. Zbl 1382.45003 El-Sayed, Ahmed M. A.; El-Sayed, Wagdy G.; Abd El-Mowla, A. A. H. 2 2017 Time evolution of the approximate and stationary solutions of the time-fractional forced-damped-wave equation. Zbl 1364.35422 El-Sayed, A. M. A.; Abdel-Rehim, E. A.; Hashem, A. S. 1 2017 Eigenvalues and eigenfunctions of non-local boundary value problems of the Sturm-Liouville equation. Zbl 1371.34033 El-Sayed, Ahmed M. A.; El-Raheem, Zaki F. A.; Buhalima, N. A. O. 1 2017 Dynamical behaviors, circuit realization, chaos control, and synchronization of a new fractional order hyperchaotic system. Zbl 1459.34140 El-Sayed, A. M. A.; Nour, H. M.; Elsaid, A.; Matouk, A. E.; Elsonbaty, A. 30 2016 Dynamical analysis and circuit simulation of a new fractional-order hyperchaotic system and its discretization. Zbl 1354.34081 El-Sayed, A. M. A.; Elsonbaty, A.; Elsadany, A. A.; Matouk, A. E. 18 2016 On the stochastic fractional calculus operators. Zbl 1499.60168 El-Sayed, Ahmed M. A. 10 2015 On some equivalent problems of stochastic differential equations of fractional order. Zbl 1488.34440 El-Sayed, A. M. A.; Eladdad, E. E.; Madkour, H. F. A. 3 2015 A study of projectile motion in a quadratic resistant medium via fractional differential transform method. Zbl 1443.70018 El-Sayed, A. M. A.; Nour, H. M.; Raslan, W. E.; El-Shazly, E. S. 3 2015 The eigenvalue problem for elliptic partial differential equation with multi-point nonlocal conditions. Zbl 1348.65159 Elsaid, Ahmed; Helal, Shaimaa M.; El-Sayed, Ahmed M. A. 2 2015 On the Cauchy problem of a delay stochastic differential equation of arbitrary (fractional) orders. Zbl 1415.34015 El-Sayed, A. M. A.; Eladdad, E. E.; Madkour, H. F. A. 2 2015 Natural metrics and boundedness of superposition operator acting between \(\mathcal B^\ast_\alpha\) and \(F^\ast(p, q, s)\). Zbl 1463.47168 El-Sayed, Ahmed M. A.; Kamal, A.; Yassen, T. I. 1 2015 Picard and Adomian decomposition methods for a quadratic integral equation of fractional order. Zbl 1308.26010 El-Sayed, A. M. A.; Hashem, H. H. G.; Ziada, E. A. A. 14 2014 Circuit realization, bifurcations, chaos and hyperchaos in a new 4D system. Zbl 1334.37029 El-Sayed, A. M. A.; Nour, H. M.; Elsaid, A.; Matouk, A. E.; Elsonbaty, A. 12 2014 Discretization of forced Duffing system with fractional-order damping. Zbl 1417.34009 El-Sayed, Ahmed M. A.; El-Raheem, Zaki F. E.; Salman, Sanaa M. 11 2014 Synchronization of different dimensional chaotic systems with time varying parameters, disturbances and input nonlinearities. Zbl 1314.34117 El-Sayed, A. M. A.; Elsaid, A.; Nour, H. M.; Elsonbaty, A. 3 2014 Existence of solution of a coupled system of differential equation with nonlocal conditions. Zbl 1371.34040 El-Sayed, A. M. A.; Abd-El-Rahman, R. O.; El-Gendy, M. 2 2014 Nonlocal and integral conditions problems for a multi-term fractional-order differential equation. Zbl 1324.34005 El-Sayed, A. M. A.; Bin-Taher, E. O. 2 2014 Positive solutions for a nonlocal multi-point boundary-value problem of fractional and second order. Zbl 1291.34009 El-Sayed, Ahmed M. A.; Bin-Taher, Ebtisam O. 17 2013 Dynamical behavior, chaos control and synchronization of a memristor-based ADVP circuit. Zbl 1305.94120 El-Sayed, A. M. A.; Elsaid, A.; Nour, H. M.; Elsonbaty, A. 13 2013 Existence results for coupled systems of quadratic integral equations of fractional orders. Zbl 1272.93068 El-Sayed, A. M. A.; Hashem, H. H. G. 9 2013 Solvability of coupled systems of fractional order integro-differential equations. Zbl 1312.45008 Hashem, H. H. G.; El-Sayed, A. M. A. 7 2013 Existence results for nonlinear quadratic integral equations of fractional order in Banach algebra. Zbl 1312.45004 El-Sayed, Ahmed; Hashem, Hind 4 2013 Uniformly stable solution of a nonlocal problem of coupled system of differential equations. Zbl 1288.34020 El-Sayed, A. M. A.; Abd-El-Rahman, R. O.; El-Gendy, M. 2 2013 Existence results for nonlinear quadratic functional integral equations of fractional orders. Zbl 1299.45017 El-Sayed, A. M. A.; Hashem, H. H. G. 1 2013 Discontinuous dynamical systems and fractional-orders difference equations. Zbl 1488.39009 El-Sayed, A. M. A.; Nasr, M. E. 1 2013 A homotopy perturbation technique for solving partial differential equations of fractional order in finite domains. Zbl 1245.65141 El-Sayed, A. M. A.; Elsaid, A.; El-Kalla, I. L.; Hammad, D. 25 2012 Dynamic properties of the fractional-order logistic equation of complex variables. Zbl 1246.37074 El-Sayed, A. M. A.; Ahmed, E.; El-Saka, H. A. A. 11 2012 A reliable treatment of homotopy perturbation method for solving the nonlinear Klein-Gordon equation of arbitrary (fractional) orders. Zbl 1235.65148 El-Sayed, A. M. A.; Elsaid, A.; Hammad, D. 10 2012 A coupled system of fractional order integral equations in reflexive Banach spaces. Zbl 1300.45001 El-Sayed, A. M. A.; Hashem, H. H. G. 5 2012 A coupled system of integral equations in reflexive Banach spaces. Zbl 1274.45016 El-Sayed, A. M. A.; Hashem, H. H. G. 4 2012 Picard and Adomian decomposition methods for a coupled system of quadratic integral equations. Zbl 1413.39040 El-Sayed, A. M. A.; Hashem, Hind H. G.; Ziada, E. A. A. 3 2012 Positive solutions for a nonlocal boundary-value problem of a class of arbitrary (fractional) orders differential equations. Zbl 1394.34010 El-Sayed, A. M. A.; Bin-Taher, E. O. 3 2012 Coupled systems of Hammerstein and Urysohn integral equations in reflexive Banach spaces. Zbl 1412.45015 El-Sayed, A. M. A.; Hashem, H. H. G. 3 2012 Monotonic positive solutions of nonlocal boundary value problems for a second-order functional differential equation. Zbl 1239.34077 El-Sayed, A. M. A.; Hamdallah, E. M.; El-Kadeky, Kh. W. 3 2012 Uniformly stable positive monotonic solution of a nonlocal Cauchy problem. Zbl 1248.34018 El-Sayed, A. M. A.; Hamdallah, E. M.; Elkadeky, Kh. W. 1 2012 On some dynamical properties of discontinuous dynamical systems. Zbl 1235.39011 El-Sayed, A. M. A. 1 2012 A nonlocal problem for a multi-term fractional-order differential equation. Zbl 1243.34004 El-Sayed, A. M. A.; Bin-Taher, E. O. 6 2011 Solutions of a class of deviated-advanced nonlocal problems for the differential inclusion \(x'(t)\in F(t,x(t))\). Zbl 1222.34076 El-Sayed, A. M. A.; Hamdallah, E. M.; Elkadeky, Kh. W. 5 2011 On the fractional-order games with non-uniform interaction rate and asymmetric games. Zbl 1488.34030 El-Sayed, A. M. A.; Ahmed, E.; Herzallah, M. A. E. 4 2011 Existence of positive continuous solution of a quadratic integral equation of fractional orders. Zbl 1488.45007 El-Sayed, A. M. A.; Mohamed, M. Sh.; Mohamed, F. F. S. 4 2011 Stability of a nonlinear non-autonomous fractional order systems with different delays and non-local conditions. Zbl 1272.34106 El-Sayed, Ahmed; Gaafar, Fatma 3 2011 Positive nondecreasing solutions for a multi-term fractional-order functional differential equation with integral conditions. Zbl 1243.34111 El-Sayed, Ahmed M. A.; Bin-Taher, Ebtisam O. 3 2011 Existence of uniformly stable solutions of nonautonomous discontinuous dynamical systems. Zbl 1252.34087 El-Sayed, A. M. A.; Nasr, M. E. 1 2011 Fractional order theory of thermoelasticity. Zbl 1183.74051 Sherief, Hany H.; El-Sayed, A. M. A.; El-Latief, A. M. Abd 129 2010 Adomian’s decomposition method for solving an intermediate fractional advection-dispersion equation. Zbl 1189.35358 El-Sayed, A. M. A.; Behiry, S. H.; Raslan, W. E. 57 2010 On the solutions of time-fractional reaction-diffusion equations. Zbl 1222.65115 Rida, S. Z.; El-Sayed, A. M. A.; Arafa, A. A. M. 41 2010 Effect of bacterial memory dependent growth by using fractional derivatives reaction-diffusion chemotactic model. Zbl 1197.92007 Rida, S. Z.; El-Sayed, A. M. A.; Arafa, A. A. M. 26 2010 Analytical and numerical solutions of multi-term nonlinear fractional orders differential equations. Zbl 1192.65092 El-Sayed, A. M. A.; El-Kalla, I. L.; Ziada, E. A. A. 25 2010 Picard and Adomian methods for quadratic integral equation. Zbl 1208.45007 El-Sayed, A. M. A; Hashem, H. H. G; Ziada, E. A. A 17 2010 On the fractional-order diffusion-wave process. Zbl 1231.35098 Herzallah, Mohamed A. E.; El-Sayed, Ahmed M. A.; Baleanu, Dumitru 14 2010 Monotonic positive solution of a nonlinear quadratic functional integral equation. Zbl 1206.45006 El-Sayed, A. M. A.; Hashem, H. H. G. 13 2010 On the solutions of the generalized reaction-diffusion model for bacterial colony. Zbl 1191.35097 El-Sayed, A. M. A.; Rida, S. Z.; Arafa, A. A. M. 11 2010 Perturbation for fractional-order evolution equation. Zbl 1209.34003 Herzallah, Mohamed A. E.; El-Sayed, Ahmed M. A.; Baleanu, Dumitru 5 2010 Stability for a non-local non-autonomous system of fractional order differential equations with delays. Zbl 1188.34107 El-Sayed, Ahmed M. A.; Gaafar, Fatma M.; Hamadalla, Eman M. A. 3 2010 A numerical algorithm for the solution of an intermediate fractional advection dispersion equation. Zbl 1221.35438 El-Sayed, A. M. A.; Behiry, S. H.; Raslan, W. E. 3 2010 Analytical and numerical solution of multi-term nonlinear differential equations of arbitrary orders. Zbl 1204.34006 El-Sayed, A. M. A.; Saleh, M. M.; Ziada, E. A. A. 3 2010 Monotonic continuous solution for a mixed type integral inclusion of fractional order. Zbl 1382.45007 El-Sayed, A. M. A.; Al-Issa, Sh. M. 3 2010 Exact solutions of some time-fractional biological population models by using generalized differential transform method. Zbl 1305.92056 El-Sayed, A. M. A.; Rida, S. Z.; Arafa, A. A. M. 1 2010 Exact solutions of fractional-order biological population model. Zbl 1184.92038 El-Sayed, A. M. A.; Rida, S. Z.; Arafa, A. A. M. 62 2009 On stability, persistence, and Hopf bifurcation in fractional order dynamical systems. Zbl 1175.37084 El-Saka, H. A.; Ahmed, E.; Shehata, M. I.; El-Sayed, A. M. A. 35 2009 On the solutions of time-fractional bacterial chemotaxis in a diffusion gradient chamber. Zbl 1394.35236 El-Sayed, A. M. A.; Rida, S. Z.; Arafa, A. A. M. 18 2009 Monotonic solutions of functional integral and differential equations of fractional order. Zbl 1181.45016 El-Sayed, A. M. A.; Hashem, H. H. G. 7 2009 Nonlocal boundary value problem of a fractional-order functional differential equation. Zbl 1394.34046 El-Sayed, A. M. A.; Abd El-Salam, Sh. A. 5 2009 Positive integrable solutions for nonlinear integral and differential inclusions of fractional-orders. Zbl 1228.26010 Al-Issa, Shorouk; El-Sayed, Ahmed Mohamed Ahmed 3 2009 Solvability of nonlinear Hammerstein quadratic integral equations. Zbl 1175.45003 El-Sayed, A. M. A.; Hashem, H. H. G. 1 2009 Integrable and continuous solutions of a nonlinear quadratic integral equation. Zbl 1178.45008 El-Sayed, A. M. A.; Hashem, H. H. G. 18 2008 ...and 54 more Documents all cited Publications top 5 cited Publications all top 5 Cited by 2,517 Authors 68 El-Sayed, Ahmed Mohamed Ahmed 36 Băleanu, Dumitru I. 25 Agarwal, Ravi P. 17 Matouk, Ahmed Ezzat 16 Shah, Kamal 15 Salem, Hussein A. H. 14 Abdeljawad, Thabet 14 Nieto Roig, Juan Jose 14 Nyamoradi, Nemat 13 El-Saka, Hala A. A. 13 Elsadany, Abdelalim A. 13 Momani, Shaher M. 12 Arafa, Anas. A. M. 12 Benchohra, Mouffak 12 Kumar, Sunil 12 O’Regan, Donal 11 Ezzat, Magdy A. 11 Rezapour, Shahram 11 Zhou, Yong 10 Al-saedi, Ahmed Eid Salem 10 Balachandran, Krishnan 10 Elsonbaty, Amr R. 10 Khan, Rahmat Ali 10 Liang, Sihua 10 Liu, Fawang 10 Tavazoei, Mohammad Saleh 9 Al-Issa, Shorouk Mahmoud 9 Bai, Zhanbing 9 Cuevas, Claudio 9 Gaafar, Fatma M. 9 Khader, Mohamed M. 9 Odibat, Zaid M. 9 Rida, Saad Zagloul 9 Sherief, Hany H. 9 Trujillo, Juan J. 9 Yu, Yajun 8 Anastassiou, George Angelos 8 Ashyralyev, Allaberen 8 Cao, Jinde 8 Herzallah, Mohamed A. E. 8 Rahman, Ghaus Ur 8 Rihan, Fathalla A. 8 Salman, Sanaa Moussa 8 Sweilam, Nasser Hassan 8 Tatar, Nasser-eddine 8 Wang, Zhen 7 Ahmad, Bashir 7 Elsaid, Ahmed 7 Haeri, Mohammad 7 Hashem, Hind H. G. 7 He, Tianhu 7 Kiliçman, Adem 7 Kumar, Devendra 7 Ouahab, Abdelghani 7 Singh, Jagdev 7 Srivastava, Hari Mohan 7 Tian, Xiaogeng 7 Zhang, Jihui 6 Abbas, Syed 6 Abouelregal, Ahmed E. 6 Al-Fadel, Masouda M. 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