On the qualitative behaviour of solutions of Liénard equation

Reissig, 1963

Cherkas, 1977, Estimation of the number of limit cycles of autonomous system, Differential Equations, 13, 529

Burton, 1968, On the generalized Liénard equation with forcing term, J. Differential Equations, 4, 620, 10.1016/0022-0396(68)90012-0

Burton, 1971, Stability regions of the forced Liénard equation, J. London Math. Soc., 3, 393, 10.1112/jlms/s2-3.3.393

Graef, 1972, On the generalized Liénard equation with negative damping, J. Differential Equations, 12, 34, 10.1016/0022-0396(72)90004-6

Ponzo, 1971, On periodic solutions of the system x′ = y − F(x), y′ = −g(x), J. Differential Equations, 10, 262, 10.1016/0022-0396(71)90050-7

Utz, 1956, Boundedness and periodicity of solutions of the generalized Liénard equation, Ann. Mat. Pura Appl., 42, 313, 10.1007/BF02411883

Hara, 1985, On the global center of generalized Liénard equation and its application to stability problems, Funkcial. Ekvac., 28, 171

Opial, 1958, Sur un théorème de A. Filippoff, Ann. Polon. Math., 5, 67, 10.4064/ap-5-1-67-75

Levinson, 1942, A general equation for relaxation oscillations, Duke Math. J., 9, 382, 10.1215/S0012-7094-42-00928-1

Filippov, 1952, Sufficient conditions for the existence of stable limit cycles of secondorder equations, Mat. Sb., 30, 171

Dragilev, 1952, Periodic solutions of the differential equation of nonlinear oscillations, Prikl. Mat. Mekh., 12, 85

Villari, 1982, Periodic solutions of Liénard equation, J. Math. Anal. Appl., 86, 379, 10.1016/0022-247X(82)90229-3

Zhang, 1985

Zanolin, 1983, On forced periodic oscillations in Dissipative Liénard System, 69, 51

Villari, 1983, On the existence of periodic solutions for Liénard equation, Nonlinear Anal., 7, 71, 10.1016/0362-546X(83)90104-9