@inproceedings{SIGIR-2011-LvZ,
	author        = "Yuanhua Lv and ChengXiang Zhai",
	booktitle     = "{Proceedings of the 34th International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/2009916.2010070",
	isbn          = "978-1-4503-0757-4",
	pages         = "1103--1104",
	publisher     = "{ACM}",
	title         = "{When documents are very long, BM25 fails!}",
	year          = 2011,
}