1.
期刊：Nonlinear Analysis: Real World Applications
卷册：Volume 220, Issue 2
年份： August 2009
页码：Pages 73-80
篇名：Stability of Hopf bifurcation of a delayed SIRS epidemic model with stage structure
作者：Tailei Zhang
链接：
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6W7S-4TXF80C-4&_user=10&_coverDate=02%2F28%2F2010&_alid=1272382616&_rdoc=2&_fmt=high&_orig=search&_cdi=6634&_sort=r&_docanchor=&view=c&_ct=123&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=8a7fa52198d330ea7dfaaf154fc125da

2.
期刊：Applied Mathematics and Computation
卷册：Volume 220, Issue 2
年份： August 2009
页码：Pages 73-80
篇名：Bifurcation analysis of a delayed epidemic model
作者：Fen-Fen Zhang
链接：
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TY8-4Y95X56-2&_user=10&_coverDate=04%2F01%2F2010&_alid=1272382616&_rdoc=1&_fmt=high&_orig=search&_cdi=5612&_sort=d&_docanchor=&view=c&_ct=123&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=75a6cbe6d15d9146621d8c70ec434172