@inproceedings{CIKM-2004-RobertsonZT,
	author        = "Stephen E. Robertson and Hugo Zaragoza and Michael J. Taylor",
	booktitle     = "{Proceedings of the 13th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/1031171.1031181",
	isbn          = "1-58113-874-1",
	pages         = "42--49",
	publisher     = "{ACM}",
	title         = "{Simple BM25 extension to multiple weighted fields}",
	year          = 2004,
}