1 Chen Lan Sun, Chen Jian.Nonlinear Biological Dynamics Systems.Beijing :Science Press, 19932 K Gopalsamy.G lobal Asymptotic Stability in a Periodic Lotka-Volterra System.J Austrian Math Soc Seri es, 1985, 66 ~ 723 F Zanolin.Permanence and Positive Periodic Solution for Kolmogorov Competing Species Systems, Results Math, 1992, 21 :224 ~ 2504 A Tineo, C Alvarea.A Differential Consideration About the Periodi c Competing Species Poblem.J Math A nal Appl, 1991, 159 :44 ~ 505 Zhao Xiaoqiang.The Qualitative Analysis of n-species Lotka-Volterra Periodic Competition Systems.M ath and Comput, Modelling 1991, 15 :3 ~ 86 Cui Jingan, Chen Lansun Stable Positive Periodic Solution of Time Dependent Lotka-Volt erra Periodic Mutualistic System.Acta Math Sci, 1994, 14 :19 ~ 237 He Chongyou, On Almost Periodi c Solutions of Lotka-Volterra Almost Periodic Competition Systems.Ann of Diff Eqs, 1993, 9:26~ 36 |