@inproceedings{SIGIR-2003-BillerbeckZ,
	author        = "Bodo Billerbeck and Justin Zobel",
	booktitle     = "{Proceedings of the 26th International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/860435.860514",
	isbn          = "1-58113-646-3",
	pages         = "387--388",
	publisher     = "{ACM}",
	title         = "{When query expansion fails}",
	year          = 2003,
}