从退化的双同宿环附近分支出周期解
龙斌,刘莹

Periodic Solutions Bifurcated from a Degenerate Double Homoclinic Loop
Bin Long,Ying Liu
图2 双同宿环附近的周期轨 $ x(t),\tilde{x}(t),x^{*}(t) $.}