David Carmel Einat Amitay Michael Herscovici Yoëlle S. Maarek Yael Petruschka Aya Soffer Juru at TREC 10 - Experiments with Index Pruning. 2001 TREC http://trec.nist.gov/pubs/trec10/papers/JuruAtTrec.pdf db/conf/trec/trec2001.html#CarmelAHMPS01