1. Baeza‐Yates, R. and Ribeiro‐Neto, B. (Eds) (1999), Modern Information Retrieval, ACM Press/Addison‐Wesley, New York, NY.
2. Bartell, B., Cottrell, G. and Belew, R. (1994), “Automatic combination of multiple retrieval systems”, 17th Annual Intl ACM SIGIR Conference on Research and Development in Information Retrieval, Dublin, Ireland, ACM Press, New York, NY, pp. 173‐81.
3. Braschler, M., Harman, D., Hess, M., Kluck, M., Peters, C. and Schäuble, P. (2000), “The evaluation of systems for cross‐language information retrieval”, paper presented at Second International Conference on Language Resources and Evaluation (LREC), Athens, Greece, pp. 1469‐74.
4. Buckland, M. et al., (1999), “Mapping entry vocabulary to unfamiliar metadata vocabularies”, D‐Lib Magazine, Vol. 5 No. 1, available at: www.dlib.org/dlib/january99/buckland/01buckland.html.
5. Crestani, F. (1994), “Comparing neural and probabilistic relevance feedback in an interactive retrieval system”, in IEEE Intl Conference on Neural Networks, Orlando, Vol. 5, pp. 3426‐30.