%0 Journal Article
%T ON THE N. A. S. C. OF LIMIT-CIRCLE CRITERION OF SOME SECOND-ORDER DIFFERENTIAL EQUATIONS<br>
%J 科学通报(英文版)
%D 1986
%I 
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=819D810940BA1E8AEC6D993C534972DD&yid=4E65715CCF57055A&vid=4AD960B5AD2D111A&iid=F3090AE9B60B7ED1&sid=4A8412AEEC89236B&eid=4A8412AEEC89236B&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=0