Gao, Bo; He, Zhirong Limit cycles of a class of planar system with \(1:2\) resonance for linear cusp. (Chinese. English summary) Zbl 1212.34101 J. Sichuan Univ., Nat. Sci. Ed. 46, No. 5, 1224-1228 (2009). MSC: 34C05 34C07 37G10 37G15 34C23 34C37 34E10 PDFBibTeX XMLCite \textit{B. Gao} and \textit{Z. He}, J. Sichuan Univ., Nat. Sci. Ed. 46, No. 5, 1224--1228 (2009; Zbl 1212.34101)
Li, Ming The period function for quadratic integrable systems with quartic orbits. (Chinese. English summary) Zbl 1212.34121 J. Math. Study 42, No. 3, 329-334 (2009). MSC: 34C25 92D25 PDFBibTeX XMLCite \textit{M. Li}, J. Math. Study 42, No. 3, 329--334 (2009; Zbl 1212.34121)
Zhou, Xin; Li, Cuiping On the algebraic structure of abelian integrals for a kind of perturbed cubic Hamiltonian systems. (English) Zbl 1180.34033 J. Math. Anal. Appl. 359, No. 1, 209-215 (2009). Reviewer: Valery A. Gaiko (Minsk) MSC: 34C07 34C08 PDFBibTeX XMLCite \textit{X. Zhou} and \textit{C. Li}, J. Math. Anal. Appl. 359, No. 1, 209--215 (2009; Zbl 1180.34033) Full Text: DOI
Tretkoff, Marvin D.; Tretkoff, Paula Transcendence of special values of Pochhammer functions. (English) Zbl 1197.11086 Int. J. Number Theory 5, No. 4, 667-677 (2009). Reviewer: Wadim Zudilin (Bonn) MSC: 11J91 11G18 33C65 PDFBibTeX XMLCite \textit{M. D. Tretkoff} and \textit{P. Tretkoff}, Int. J. Number Theory 5, No. 4, 667--677 (2009; Zbl 1197.11086) Full Text: DOI
He, Zhirong; Zhang, Weinian Critical periods of a periodic annulus linking to equilibria at infinity in a cubic system. (English) Zbl 1180.34034 Discrete Contin. Dyn. Syst. 24, No. 3, 841-854 (2009). Reviewer: Valery A. Gaiko (Minsk) MSC: 34C08 37J45 34C05 PDFBibTeX XMLCite \textit{Z. He} and \textit{W. Zhang}, Discrete Contin. Dyn. Syst. 24, No. 3, 841--854 (2009; Zbl 1180.34034) Full Text: DOI