The following publications are possibly variants of this publication:
- On the number of limit cycles of a Z::4::-equivariant quintic polynomial systemWeijiao Xu, Maoan Han. amc, 216(10):3022-3034, 2010. [doi]
- Limit Cycles for a Class of quintic Near-Hamiltonian Systems Near a Nilpotent CenterJiao Jiang, Jizhou Zhang, Maoan Han. IJBC, 19(6):2107-2113, 2009. [doi]
- The Number and Distributions of Limit Cycles for a Class of Quintic Near-Hamiltonian SystemsHong Zang, Maoan Han, Tonghua Zhang, Moses O. Tadé. cma, 52(10-11):1577-1594, 2006. [doi]