1. Vandermeer J, Goldberg D (2003) Population ecology: First principles. Woodstock, Oxfordshire: Princeton University Press.
2. Murray J (1998) Mathematical Biology. New York: Springer-Verlag Berlin Heidelberg.
3. Lotka A (1925) Elements of Physical Biology. Baltimore: Williams and Wilkins.
4. Volterra V (1931) Lecons sur la Theorie Mathematique de la Lutte pour la Vie. Paris: Gauthier- Villars.
5. Global stability of predator-prey interactions;G Harrison;J Math Biology,1979