共 50 条
- [1] A GENERIC GEOMETRIC CHARACTERIZATION OF QUADRATIC VECTOR-FIELDS WITH A CENTER [J]. COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE I-MATHEMATIQUE, 1990, 310 (10): : 723 - 726
- [2] QUADRATIC HAMILTONIAN VECTOR-FIELDS [J]. JOURNAL OF DIFFERENTIAL EQUATIONS, 1994, 107 (01) : 80 - 95
- [3] SOLUTION OF DULAC PROBLEM FOR QUADRATIC VECTOR-FIELDS [J]. ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS, 1985, 57 (03): : 265 - 266
- [4] ABELIAN-INTEGRALS FOR QUADRATIC VECTOR-FIELDS [J]. JOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK, 1987, 382 : 165 - 180
- [5] CURLS VECTOR-FIELDS AND QUADRATIC POISSON STRUCTURES [J]. COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE I-MATHEMATIQUE, 1991, 312 (01): : 137 - 140
- [8] LIMIT-CYCLES OF PERTURBATIONS OF QUADRATIC HAMILTONIAN VECTOR-FIELDS [J]. JOURNAL DE MATHEMATIQUES PURES ET APPLIQUEES, 1993, 72 (02): : 213 - 238