1. Integrodifferential equations and delay models in population dynamics;Cushing,1977
2. A mathematical treatment of dynamical models in biological science;Smitalova,1991
3. Time lags in biological models;MacDonald,1978
4. Stable oscillations in a predator–prey model with time lag;Farkas;J. Math. Anal. Appl.,1984
5. Introduction to nonlinear differential and integral equations;Davis,1962