共 50 条
- [3] EXISTENCE OF QUASI-PERIODIC SOLUTIONS FOR FIRST ORDER DIFFERENTIAL SYSTEMS [J]. ATTI DELLA ACCADEMIA NAZIONALE DEI LINCEI RENDICONTI-CLASSE DI SCIENZE FISICHE-MATEMATICHE & NATURALI, 1969, 47 (06): : 468 - &
- [4] SUFFICIENT CONDITIONS FOR THE EXISTENCE OF PERIODIC SOLUTIONS OF SYSTEMS OF WEAKLY NONLINEAR 1ST AND 2ND ORDER DIFFERENTIAL EQUATIONS [J]. JOURNAL OF MATHEMATICS AND MECHANICS, 1958, 7 (02): : 163 - 171
- [8] ON THE EXISTENCE OF SOLUTIONS FOR 1ST ORDER QUASILINEAR SYMMETRIZABLE SYSTEMS OF PARTIAL-DIFFERENTIAL EQUATIONS [J]. CHINESE ANNALS OF MATHEMATICS SERIES B, 1982, 3 (03): : 353 - 364
- [10] EXISTENCE OF NONOSCILLATORY SOLUTIONS OF 1ST ORDER NONLINEAR NEUTRAL EQUATIONS [J]. JOURNAL OF THE AUSTRALIAN MATHEMATICAL SOCIETY SERIES B-APPLIED MATHEMATICS, 1990, 32 : 180 - 192