@inproceedings{ECIR-2009-HeO,
	author        = "Ben He and Iadh Ounis",
	booktitle     = "{Proceedings of the 31st European Conference on Information Retrieval Research: Advances in Information Retrieval}",
	doi           = "10.1007/978-3-642-00958-7_57",
	isbn          = "978-3-642-00957-0",
	pages         = "611--619",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Studying Query Expansion Effectiveness}",
	volume        = 5478,
	year          = 2009,
}