Zou, Lan; Chen, Xingwu Center conditions for polynomial Liénard equation. (English) Zbl 1199.34163 J. Sichuan Univ., Nat. Sci. Ed. 45, No. 5, 1051-1056 (2008). MSC: 34C05 34C07 PDF BibTeX XML Cite \textit{L. Zou} and \textit{X. Chen}, J. Sichuan Univ., Nat. Sci. Ed. 45, No. 5, 1051--1056 (2008; Zbl 1199.34163)
Zou, Lan; Chen, Xingwu; Zhang, Weinian Local bifurcations of critical periods for cubic Liénard equations with cubic damping. (English) Zbl 1163.34349 J. Comput. Appl. Math. 222, No. 2, 404-410 (2008). Reviewer: Alexander Grin (Grodno) MSC: 34C23 34C05 34C25 PDF BibTeX XML Cite \textit{L. Zou} et al., J. Comput. Appl. Math. 222, No. 2, 404--410 (2008; Zbl 1163.34349) Full Text: DOI