(Department of Basic Sciences,NAAU,Yantai Shangdong 264001,China)
周刚,时宝,盖明久,杨树杰.一类具有时滞的细胞繁殖模型的正周期解的存在性[J].海军航空大学学报,2008,23(1):112-114ZHOU Gang, SHI Bao, GAI Ming-jiu, YANG Shu-jie. The Existence of Positive Periodic Solutions of a Delayed Model in Population of Cells[J]. JOURNAL OF NAVAL AVIATION UNIVERSITY,2008,23(1):112-114
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