1. Andronov, A.A., Leontovich, E.A., Gordon, I., Maier, A.G., 1973. Qualitative Theory of Second-Order Dynamic Systems. A Halsted Press Book. Wiley, New York, p. 524.
2. Lyapunov functions for a generalized Gause-type model;Ardito;J. Math. Biol.,1995
3. Arrowsmith, D.K., Place, C.M., 1992. Dynamical System. Differential Equations, Maps and Chaotic Behaviour. Chapman and Hall, London, p. 330.
4. Credible, parsimonious and useful predator–prey models—a reply to Abrams, Gleeson, and Sarnelle;Berryman;Ecology,1995
5. Clark, C.W., 1990. Mathematical Bioeconomic: The Optimal Management of Renewable Resources, 2nd ed. Wiley, New York, p. 291.