期刊名称：International Journal of Mathematics and Mathematical Sciences
印刷版ISSN：0161-1712
电子版ISSN：1687-0425
出版年度：2006
卷号：2006
DOI：10.1155/IJMMS/2006/38617
出版社：Hindawi Publishing Corporation
摘要：Sufficient conditions are obtained for the existence of at least
one positive periodic solution of a periodic cooperative model
with delays and impulses by using Mawhin's continuation theorem of
coincidence degree theory.
