Periodicity and Permanence of LotkaVolteraa Three SpeciesCooperative System with Infinite Delay
GUO Wei1,2, CHENG Rongfu1
1. College of Mathematics, Beihua University, Jilin 132013, Jilin Province, China;2. Institute of Mathematics, Jilin University, Changchun 130012, China
GUO Wei, CHENG Rong-Fu. Periodicity and Permanence of LotkaVolteraa Three SpeciesCooperative System with Infinite Delay[J].J4, 2010, 48(06): 893-898.