1. STEPHENS, D. W., and KREBS, J. R., Foraging Theory, Princeton University Press, Princeton, New Jersey, 1986.
2. ALCOCK, J., Animal Behavior: An Evolutionary Approach, Sinauer Associates, Sunderland, Massachusetts, 1998.
3. BELL, W. J., Searching Behavior: The Behavioral Ecology of Finding Resources, Chapman and Hall, London, England, 1991.
4. GRUNBAUM, D., Schooling as a Strategy for Taxis in a Noisy Environment, Evolutionary Ecology, Vol. 12, pp. 503–522, 1998.
5. BONABEAU, E., DORIGO, M., and THERAULAZ, G., Swarm Intelligence: From Natural to Artificial Systems, Oxford University Press, New York, NY, 1999.