共 50 条
- [41] PERIODIC-SOLUTIONS OF SOME NONLINEAR FUNCTIONAL DIFFERENTIAL EQUATIONS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1973, 20 (03): : A366 - A366
- [42] PERIODIC-SOLUTIONS IN LARGE OF NONLINEAR ORDINARY DIFFERENTIAL EQUATIONS NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1975, 22 (03): : A415 - A415
- [44] PERIODIC-SOLUTIONS TO ORDINARY DIFFERENTIAL-EQUATIONS WITH IMPULSES SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY, 1993, 36 (07): : 778 - 790