期刊：Applied Mathematics Letters
卷册：Volume 41, Issue 5
年份：1 September 2005
页码：Pages 2319-2325
篇名：Existence of positive periodic solutions for difference equations  with feedback control
作者：Yongkun Li
链接:
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TY9-4F7H52T-4&_user=10&_coverDate=01%2F01%2F2005&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1429371419&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=7b0effb081b466412efbd4f4d427f3c6