Luan, Shixia; Su, Hua; Sun, Qinfu Positive solutions to third-order two-point semipositone boundary value problems. (English) Zbl 1177.34034 Int. J. Math. Anal., Ruse 3, No. 1-4, 99-108 (2009). MSC: 34B18 34B16 PDFBibTeX XMLCite \textit{S. Luan} et al., Int. J. Math. Anal., Ruse 3, No. 1--4, 99--108 (2009; Zbl 1177.34034) Full Text: Link
Afrouzi, G. A.; Vahidi, J.; Rasouli, S. H. On critical exponent for existence of positive weak solutions for a class of semipositone problems involving the \(p\)-Laplacian operator. (English) Zbl 1175.35065 Int. J. Math. Anal., Ruse 2, No. 17-20, 993-998 (2008). MSC: 35J65 35B33 35D30 35J20 PDFBibTeX XMLCite \textit{G. A. Afrouzi} et al., Int. J. Math. Anal., Ruse 2, No. 17--20, 993--998 (2008; Zbl 1175.35065) Full Text: Link
Afrouzi, G. A.; Vahidi, J.; Rasouli, S. H. On critical exponent for existence of positive solutions for some semipositone problems involving the weight function. (English) Zbl 1175.35064 Int. J. Math. Anal., Ruse 2, No. 17-20, 987-991 (2008). MSC: 35J65 35J60 35J20 35B33 PDFBibTeX XMLCite \textit{G. A. Afrouzi} et al., Int. J. Math. Anal., Ruse 2, No. 17--20, 987--991 (2008; Zbl 1175.35064) Full Text: Link
Afrouzi, G. A.; Vahidi, J.; Rasouli, S. H. A remark on the existence of positive solution to a nonlinear semipositone system involving the weight function. (English) Zbl 1177.35064 Int. J. Math. Anal., Ruse 2, No. 21-24, 1023-1029 (2008). MSC: 35J56 35J60 35J50 PDFBibTeX XMLCite \textit{G. A. Afrouzi} et al., Int. J. Math. Anal., Ruse 2, No. 21--24, 1023--1029 (2008; Zbl 1177.35064) Full Text: Link
Afrouzi, G. A.; Vahidi, J.; Rasouli, S. H. A note on the existence of positive solution for a nonlinear semipositone system. (English) Zbl 1170.35386 Int. J. Math. Anal., Ruse 2, No. 21-24, 1015-1021 (2008). MSC: 35J55 35J60 35J50 PDFBibTeX XMLCite \textit{G. A. Afrouzi} et al., Int. J. Math. Anal., Ruse 2, No. 21--24, 1015--1021 (2008; Zbl 1170.35386) Full Text: Link