在具余维２奇点的四维系统的两参数开折的研究中出现一类三点异宿环的扰动分支，对此异宿环产生极限环的唯一性一直未得到完整的解决，本......

Comments on 'Non-existence of Shilnikov chaos in continuous-time systems' are given.An error has been found in t......