1LEVIN S A. Dispersion and population interactions [ J ]. Amer Natur, 1974,108 : 207-228.
2TAKEUCHI Y. Conflict between the need to forage and the need to avoid competition-Persistence of two-species model[ J ]. Math Biosci, 1990,99 : 187-194.
3WANG W, MA Z. Asymptotic behavior of a predator-prey system with diffusion and delays [J ]. J Math Anal Appl, 1997,206: 191-204.
4BERETTA E, KUANG Y. Global analysis in some delayed ratio-dependent predator-prey systems [ J ]. Nonlinear Analysis, 1998,32 :381-408.
5GOPALSAMY K. Stability and Oscillation in Delay Differential Equations of Population Dynamics [ M ]. Dordecht :Kluwer Academic, 1992.
