共 50 条
- [43] On the number of limit cycles which appear by perturbation of Hamiltonian two-saddle cycles of planar vector fields Bulletin of the Brazilian Mathematical Society, New Series, 2011, 42 : 1 - 23
- [44] On the number of limit cycles which appear by perturbation of Hamiltonian two-saddle cycles of planar vector fields BULLETIN OF THE BRAZILIAN MATHEMATICAL SOCIETY, 2011, 42 (01): : 1 - 23
- [49] LIMIT-CYCLES OF QUADRATIC SYSTEMS COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE A, 1980, 291 (05): : 337 - 340