Han, M., Jiang, J., and Zhu, H., 2008: Limit Cycle Bifurcations in Near-Hamiltonian Systems by Perturbing a Nilpotent Center. Internat. J. Bifur. Chaos Appl. Sci. Engrg. Vol. 18 (10), p. 3013-3027
Han, M., Jiang, J., and Zhu, H., 2008: Limit Cycle Bifurcations in Near-Hamiltonian Systems by Perturbing a Nilpotent Center. Internat. J. Bifur. Chaos Appl. Sci. Engrg. Vol. 18 (10), p. 3013-3027