带反馈项的n类物种竞争模型的正周期解的存在性
张雪梅,刘衍胜
Existence of positive periodic solutions for a n-species competition system with feedback control
ZHANG Xue-Mei, LIU Yan-Sheng
J4 . 2013, (1): 1 -5 .  DOI: 10.3976/j.issn.1002-4026.2013.01.001