Simple BM25 extension to multiple weighted fields

From Tetherless World Wiki

\begin{bibtex} @inproceedings{DBLP:conf/cikm/RobertsonZT04, title={Simple BM25 extension to multiple weighted fields}, pages={42-49}, year={2004}, crossref={DBLP:conf/cikm/2004}, booktitle={CIKM}, ee={http://doi.acm.org/10.1145/1031171.1031181}, url={http://www.informatik.uni-trier.de/~ley/db/conf/cikm/cikm2004.html#RobertsonZT04}, author={Stephen E. Robertson and Hugo Zaragoza and Michael J. Taylor} }\end{bibtex}