中国科学院数学与系统科学研究院期刊网
^BIFURCATION PHENOMENON OF THE HETEROCLINIC CYCLE IN HAMILTONIAN SYSTEM WITH AUTONOMOUS PERTURBATION
LI BAOYI
Acta Mathematicae Applicatae Sinica . 1994, (2): 239 -247 .  DOI: 10.12387/C1994023