MathSciNet bibliographic data MR2996610 34C07 Yu, Pei; Han, Maoan Bifurcation of limit cycles in 3rd-order \$Z\sb 2\$$Z\sb 2$ Hamiltonian planar vector fields with 3rd-order perturbations. Commun. Nonlinear Sci. Numer. Simul. 18 (2013), no. 4, 978–988. Article

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