1. Modern Information Retrieval;Baeza-Yates,1999
2. Granular Computing: An Introduction;Bargiela,2002
3. Pattern Recognition and Fuzzy Objective Function Algorithms;Bezdek,1981
4. Partitioning-based clustering for Web document categorization;Boley;Decision Support Systems,1999
5. Syntactic clustering of the Web;Broder;Comput. Networks ISDN Systems,1997