共 50 条
- [24] An approximation method for the existence of periodic solutions to systems with delay ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK, 1996, 76 : 205 - 208
- [27] Families of quasi-periodic motions in dynamical systems depending on parameters NONLINEAR DYNAMICAL SYSTEMS AND CHAOS, 1996, 19 : 171 - 211
- [29] Necessary and sufficient conditions for existence of periodic motions of forced systems of particles Zeitschrift für angewandte Mathematik und Physik ZAMP, 2001, 52 : 535 - 540
- [30] Necessary and sufficient conditions for existence of periodic motions of forced systems of particles ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK, 2001, 52 (03): : 535 - 540