Hong, Chun; Zou, Lan Abelian integrals and critical periods for a class of reversible quadratic systems. (Chinese. English summary) Zbl 1274.34095 J. Sichuan Univ., Nat. Sci. Ed. 49, No. 5, 960-964 (2012). MSC: 34C08 37J45 34C25 34C05 34C14 PDF BibTeX XML Cite \textit{C. Hong} and \textit{L. Zou}, J. Sichuan Univ., Nat. Sci. Ed. 49, No. 5, 960--964 (2012; Zbl 1274.34095) Full Text: DOI
Chen, Xingwu; Li, Yan; Zou, Lan Bifurcation of critical periods for planar Hamiltonian systems of degree \(2n-1\). (English) Zbl 1212.37077 J. Sichuan Univ., Nat. Sci. Ed. 46, No. 1, 11-14 (2009). MSC: 37K50 34C23 34C25 PDF BibTeX XML Cite \textit{X. Chen} et al., J. Sichuan Univ., Nat. Sci. Ed. 46, No. 1, 11--14 (2009; Zbl 1212.37077)