Microsoft Cambridge at TREC-12: HARD track.

@inproceedings{robertson-2003-microsoft, author = {Stephen E. Robertson and Hugo Zaragoza and Michael J. Taylor}, editor = {Ellen M. Voorhees and Lori P. Buckland}, title = {{Microsoft Cambridge at TREC-12: HARD track}}, booktitle = {{Proceedings of The Twelfth Text REtrieval Conference, TREC 2003, Gaithersburg, Maryland, USA, November 18-21, 2003}}, series = {NIST Special Publication}, volume = {500-255}, pages = {418--425}, publisher = {National Institute of Standards and Technology (NIST)}, year = {2003}, url = {http://trec.nist.gov/pubs/trec12/papers/microsoft-cambridge.hard.pdf} }