1. The theory of prey-predator oscillations;Bulmer;Theor. Popul. Biol,1976
2. Predator mediated coexistence: A non-equilibrium model;Caswell;Amer. Natur,1977
3. The biological control of prickly pear in Australia;Dodd,1959
4. Introduction to the Theory and Application of Differential Equations with Deviating Arguments;El'sgol'ts,1973
5. Functional Differential Equations;Hale,1971