中国科学院数学与系统科学研究院期刊网
AMS
On the Bifurcations of a Hamiltonian Having Three Homoclinic Loops under Z3 Invariant Quintic Perturbations
Yu Hai WU, Mao An HAN
Acta Mathematica Sinica . 2007, (5): 869 -878 .  DOI: 10.1007/s10114-005-0790-3