共 50 条
- [34] Coexistence of unbounded solutions and periodic solutions of Lienard equations with asymmetric nonlinearities at resonance SCIENCE IN CHINA SERIES A-MATHEMATICS, 2007, 50 (08): : 1205 - 1216
- [36] Infinitely many periodic solutions of planar Hamiltonian systems via the Poincare-Birkhoff theorem BOUNDARY VALUE PROBLEMS, 2018,
- [39] Periodic Solutions for Subquadratic Discrete Hamiltonian Systems Advances in Difference Equations, 2007