1. Carlson, J., Cumby, C.M., Rizzolo, N.D., Rosen, J.L., Roth, D.: SNoW user manual. Version: January 2004. Technical report, UIUC (2004)
2. Cohen, W.W., Singer, Y.: Context-sensitive learning methods for text categorization. ACM Transactions on Information Systems 17(2), 141–173 (1999)
3. CRM114: The controllable regex mutilator, http://crm114.sourceforge.net/
4. Dagan, I., Karov, Y., Roth, D.: Mistake-driven learning in text categorization. In: EMNLP 1997 (1997)
5. Gómez Hidalgo, J.M., Puertas Sanz, E., Maña López, M.J.: Evaluating costsensitive unsolicited bulk email categorization. In: JADT 2002, Madrid, ES (2002)