The following publications are possibly variants of this publication:
- Bifurcations of limit cycles in a cubic system with cubic perturbationsHong Zang, Tonghua Zhang, Maoan Han. amc, 176(1):341-358, 2006. [doi]
- Centers and Limit Cycles of a Generalized Cubic Riccati SystemZhengxin Zhou, Valery G. Romanovski, Jiang Yu. IJBC, 30(2), 2020. [doi]
- On the Number and Distribution of Limit Cycles in a cubic SystemMaoan Han, Tonghua Zhang, Hong Zang. IJBC, 14(12):4285-4292, 2004. [doi]
- Integrability and bifurcations of Limit cycles in a cubic Kolmogorov SystemFeng Li. IJBC, 23(4), 2013. [doi]