Arnold, S. J., 1972, Species densities of predators and their prey: American
Naturalist, v. 106, p. 220-236.
Bartram, B. C. R., 1979, Serengeti Predators and Their Social Systems, in
Sinclair, A. R. E., and Norton-Griffiths, M., eds., Serengeti: Dynamics of
an Ecosystem: Chicago, University of Chicago Press, p. 221-248.
Kruuk, H., 1972, The Spotted Hyena: A Study of Predation and Social Behavior:
Chicago, University of Chicago Press.
Paulson, D. R., 1973, Predator polymorphism and stochastic selection: Evolution,
v. 27, p. 269-277.