1. F. Sebastiani, “Machine learning in automated text categorization,” ACM Comput. Surv. 34 (1), 1–47 (2002).
2. V. Vapnik, The Nature of Statistical Learning Theory (Springer, Berlin, 1995).
3. R. Schapire, “The strength of weak Learnability,” in Machine Learning (Kluwer Academic, Boston, MA, 1990), pp. 197–227.
4. T. Hofmann and L. Cai, “Text categorization by boosting automatically extracted concepts,” in Proceedings of the 26th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (Toronto, Canada, 2003), pp. 182–189.
5. T. Joachims, “Text categorization with support vector machines: learning with many relevant features,” in Pro-ceedings of the 10th European Conference on Machine Learning (Springer, London, UK, 1998), pp. 137–142.