Authors: Zhao, Li Qin Li, De Ping

Citation: Zhao, Li Qin et Li, De Ping, Bifurcations of limit cycles from a quintic Hamiltonian system with a heteroclinic cycle, Acta mathematica Sinica. English series (Print) , 30(3), 2014, pp. 411-422

Authors: Zhao, Li Qin

Citation: Zhao, Li Qin, Cyclicity of Degenerate Polycycles Through a Saddle-Node and Two Hyperbolic Saddles, Acta mathematica Sinica. English series (Print) , 21(3), 2005, pp. 507-516