1. Lecture Notes in Computer Science;A.M. Lam-Adesina,2004
2. Snowball toolkit,
http://snowball.tartarus.org/
3. Porter, M.F.: An algorithm for suffix stripping. Program 14, 10–137 (1980)
4. Lam-Adesina, A.M., Jones, G.J.F.: Applying Summarization Techniques for Term Selection in Relevance Feedback. In: Proceedings of the 24th Annual International ACM SIGIR Conference, New Orleans, pp. 1–9. ACM, New York (2001)
5. Lecture Notes in Computer Science;C. Peters,2005