Li, Ming The monotonicity of period function for a class of quadratic reversible systems. (Chinese. English summary) Zbl 1199.34198 Math. Pract. Theory 38, No. 15, 225-230 (2008). MSC: 34C25 Periodic solutions to ordinary differential equations Keywords:period function; quadratic reversible systems; Picard-Fuchs equation; monotonicity PDFBibTeX XMLCite \textit{M. Li}, Math. Pract. Theory 38, No. 15, 225--230 (2008; Zbl 1199.34198)