1. Webb, A.: Statistical Pattern Recognition. Wiley, New Jersey (2002)
2. Tan, P.N., Steinbach, M., Kumar, V.: Introduction to Data Mining. Addison-Wesley, Boston (2005)
3. Alpaydin, E.: Introduction to Machine Learning. MIT Press, Cambridge (2004)
4. Dunn, J.C.: A fuzzy relative ISODATA process and its use in detecting compact well-separated clusters. J. Cybern. 3(3), 32–57 (1974)
5. Bezdek, J.C.: Fuzzy mathematics in pattern classification, Ph.D. Dissertation. Applied Mathematics, Cornell University. Ithaca. New York (1973)