About author:LIU Yan-wei(1978-), male, native of Zhoukou, Henan, M.S.D., a lecturer of Zhoukou Normal
University, engages in differential equations and its application.
Supported by:
Supported by the Education Department Natural Science Foundation of Henan Province(2008A180041);
LIU Yan-wei, LU Kai-zhang. Permanence and Periodic Solution of an Impulsive Delay Two-prey One-predator System with Variable Coefficients[J]. Chinese Quarterly Journal of Mathematics, 2009, 24(2): 267-273.