2Jingru Zhang,Lansun Chen,Xiu Dong Chen.Persistence and global stability for two-species nonautonomous competition Lotka-Volterra patch-system with time delay[J].Nonlinear Analysis,1999,37(8):1019-1028.
3Zhang J,Chen L.Permanence and global stability for two-species cooperative system with delays in two-patch environment[J].Math.Computer.Modelling,1996,23(7):17-27.
4Yang kuang.Delay Differential Equation with Application in Dynamics[M].San diego CA:Academic press INC,1993,27-46.
