共 50 条
- [21] Periodic solutions of planar Hamiltonian systems with asymmetric nonlinearities [J]. BOUNDARY VALUE PROBLEMS, 2017,
- [23] Geometry of the Kahan discretizations of planar quadratic Hamiltonian systems [J]. PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2019, 475 (2223):
- [25] Planar Hamiltonian systems at resonance: the Ahmad–Lazer–Paul condition [J]. Nonlinear Differential Equations and Applications NoDEA, 2013, 20 : 825 - 843