1. An information-theoretic perspective of tf·idf measures;Aizawa;Inform. Process. Manage.,2003
2. Automated learning decision rules for text categorization;Apté;ACM Trans. Inform. Syst.,1994
3. Modern Information Retrieval;Baeza-Yates,1999
4. Lexical analysis and stoplists;Fox,1992
5. Garofolo, J., Auzanne, C., Voorhees, E., 1999. The TREC spoken document retrieval track: a success story. In: Proceedings of the 8th Text REtrieval Conference, pp. 107–130.