共 50 条
- [31] FORCED-OSCILLATIONS OF ASYMPTOTICALLY LINEAR HAMILTONIAN-SYSTEMS BOLLETTINO DELLA UNIONE MATEMATICA ITALIANA, 1987, 1B (03): : 729 - 740
- [32] OSCILLATIONS OF 2ND ORDER NEUTRAL EQUATIONS CANADIAN JOURNAL OF MATHEMATICS-JOURNAL CANADIEN DE MATHEMATIQUES, 1988, 40 (06): : 1301 - 1314
- [36] PERIODIC-SOLUTIONS OF NONAUTONOMOUS HAMILTONIAN-SYSTEMS WITH SYMMETRIES JOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK, 1994, 451 : 149 - 159
- [39] PERIODIC-SOLUTIONS OF HAMILTONIAN-SYSTEMS WITH SUPERQUADRATIC POTENTIAL ANNALI DI MATEMATICA PURA ED APPLICATA, 1986, 143 : 1 - 46