1. Anderberg, M.R.: Cluster Analysis for Applications. Academic Press, Inc., New York (1973)
2. Lecture Notes in Artificial Intelligence;A. Casillas,2003
3. Cui, X., Gao, J., Potok, T.E.: A Flocking Based Algorithm for Document Clustering Analysis. Journal of System Architecture (2006)
4. Cui, X., Potok, T.E.: Document Clustering Analysis Based on Hybrid PSO+K-means Algorithm. Journal of Computer Sciences Special Issue, 27–33 (2005)
5. Deneubourg, J.L., Goss, S., SendovaFranks, N., Detrain, C., Chretien, L.: The dynamics of collective sorting robot-like ants and ant-like robots. In: Proceedings of the first international conference on simulation of adaptive behavior on From animals to animats, pp. 356–363. MIT Press, Cambridge