Limit Cycle Bifurcations from an Order-3 Nilpotent Center of Cubic Hamiltonian Systems Perturbed by Cubic Polynomials.

Li Zhang Chenchen Wang Zhaoping Hu Limit Cycle Bifurcations from an Order-3 Nilpotent Center of Cubic Hamiltonian Systems Perturbed by Cubic Polynomials. 2050126:1-2050126:11 2020 30 Int. J. Bifurc. Chaos 9 https://doi.org/10.1142/S0218127420501266 db/journals/ijbc/ijbc30.html#ZhangWH20