1. Beni, G., Wang, J.: Swarm Intelligence. In: Proc. 7th Ann. Meeting of the Robotics Society of Japan (in Japanese), pp. 425–428 (1989)
2. Bonabeau, E., Dorigo, M., Theraulaz, G.: Swarm Intelligence: From Natural to Artificial Systems. Oxford Univ. Press, New York (1999)
3. Kennedy, J., Eberhart, R.C.: Swarm Intelligence. Morgan Kauffman, San Mateo (2001)
4. Parrish, J.K., Hamner, W.M. (eds.): Animal Groups in Three Dimensions. Cambridge University Press, Cambridge (1997)
5. Camazine, S., Deneubourg, J.-L., Franks, N.R., Sneyd, J., Theraulaz, G., Bonabeau, E.: Self-Organization in Biological Systems. Princeton Univ. Press, Princeton (2001)