共 50 条
- [31] Research on the Poincaré center-focus problem of some cubic differential systems by using a new method [J]. Advances in Difference Equations, 2017
- [34] Solution of the center-focus problem for a cubic system reducible to a lienard system [J]. Differential Equations, 2006, 42 : 10 - 25
- [35] Solution of the center-focus problem for a nine-parameter cubic system [J]. Differential Equations, 2011, 47
- [36] THE CENTER-FOCUS PROBLEM AND BIFURCATION OF LIMIT CYCLES IN A CLASS OF 7TH-DEGREE POLYNOMIAL SYSTEMS [J]. JOURNAL OF APPLIED ANALYSIS AND COMPUTATION, 2016, 6 (03): : 817 - 826
- [39] Center-focus problem and limit cycles bifurcations for a class of cubic Kolmogorov model [J]. Nonlinear Dynamics, 2013, 72 : 197 - 206