6Yang Y, Wilbur W J. Using Corpus Statistics to Remove Redundant Words in Text Categorization. In J. Amer. Soc. Inf Sci.,1996.
7Yang Y, Pedersen J O. A Comparative Study on Feature Selection in Text Categorization. KDD-2000 Sixth ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, Boston,MA,UA, 2000.
8Galavotti L, Sebastiani F, Simi M. Feature Selection and Negative Evidence in Automated Text Categorization. KDD-2000 Sixth ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, Boston,MA, UA, 2000.
9Mena J. Data Mining Your Website. America, 2000:368.
