1. Cleverdon, C.: The Cranfield Tests on Index Language Devices. In: Sparck-Jones, K., Willett, P. (eds.) Readings in Information Retrieval, pp. 47–59. Morgan Kaufmann, San Francisco (1997)
2. Harman, D.: The TREC Conferences. In: Kuhlen, R., Rittberger, M. (eds.) Hypertext - Information Retrieval - Multimedia: Synergieeffekte Elektronischer Informationssysteme, Proceedings of HIM 1995, Universitätsverlag Konstanz, pp. 9–28 (1995)
3. Lecture Notes in Computer Science;E. Voorhees,2002
4. Text REtrieval Conference (TREC) Series:
http://trec.nist.gov/
5. NTCIR (NII-NACSIS Test Collection for IR Systems):
http://research.nii.ac.jp/ntcir/