1. Geometrical Method in Theory of Ordinary Differential Equation;Arnold,1983
2. Ten problems;Arnold;Adv. Soviet Math.,1990
3. Bifurcations of limit cycles from quintic Hamiltonian systems with an eye-figure loop;Asheghi;Nonlinear Anal.,2007
4. Small-amplitude limit cycles in Lieńard systems;Christopher;Nonlinear Differential Equations Appl.,1996
5. Cubic Liénard equations with quadratic damping having two antisaddles;Dumortier;Qual. Theory Dyn. Syst.,2000