共 50 条
- [34] BIFURCATIONS OF LIMIT CYCLES FOR A PERTURBED CUBIC SYSTEM WITH DOUBLE FIGURE EIGHT LOOP INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS, 2013, 23 (04):
- [40] Normal forms and global phase portraits of quadratic and cubic integrable vector fields having two nonconcentric circles as invariant algebraic curves DYNAMICAL SYSTEMS-AN INTERNATIONAL JOURNAL, 2017, 32 (03): : 374 - 390