共 50 条
- [32] PERIODIC SOLUTIONS OF FORCED CONSERVATIVE SYSTEMS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1971, 18 (04): : 651 - &
- [35] Periodic quasiperiodic solutions of second order Duffing's equations DIFFERENTIAL EQUATIONS AND CONTROL THEORY, 1996, 176 : 35 - 44
- [39] Periodic solutions for discontinuous perturbations of the relativistic operator BULLETIN DES SCIENCES MATHEMATIQUES, 2016, 140 (01): : 99 - 117
- [40] PERIODIC SOLUTIONS OF THE TELEGRAPH EQUATION WITH A DISCONTINUOUS NONLINEARITY UFA MATHEMATICAL JOURNAL, 2012, 4 (02): : 74 - 79