1. Global stability in two species interactions;Goh;J. Math. Biol.,1976
2. Global stability in two species systems;Hastings;J. Math. Biol.,1978
3. Stability and delays in a predator-prey system;He;J. Math. Anal. Appl.,1996
4. Stability and Complexity in Model Ecosystems;May,1974
5. Periodic solutions of delay differential equations of threshold-type delays;Smith,1992