Twenty-One at TREC7: Ad-hoc and Cross-Language Track.

@inproceedings{hiemstra-1998-twentyone, author = {Djoerd Hiemstra and Wessel Kraaij}, editor = {Ellen M. Voorhees and Donna K. Harman}, title = {{Twenty-One at TREC7: Ad-hoc and Cross-Language Track}}, booktitle = {{Proceedings of The Seventh Text REtrieval Conference, TREC 1998, Gaithersburg, Maryland, USA, November 9-11, 1998}}, series = {NIST Special Publication}, volume = {500-242}, pages = {174--185}, publisher = {National Institute of Standards and Technology (NIST)}, year = {1998} }