共 50 条
- [2] UNIQUENESS OF LIMIT CYCLES FOR QUADRATIC VECTOR FIELDS [J]. DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS, 2019, 39 (01): : 483 - 502
- [3] QUADRATIC VECTOR-FIELDS IN THE PLANE HAVE A FINITE NUMBER OF LIMIT-CYCLES [J]. PUBLICATIONS MATHEMATIQUES, 1986, (64): : 111 - 142
- [7] On the number of limit cycles which appear by perturbation of two-saddle cycles of planar vector fields [J]. Functional Analysis and Its Applications, 2013, 47 : 174 - 186