@inproceedings{ECIR-2008-HeLR,
	author        = "Jiyin He and Martha Larson and Maarten de Rijke",
	booktitle     = "{Proceedings of the 30th European Conference on Information Retrieval Research: Advances in Information Retrieval}",
	doi           = "10.1007/978-3-540-78646-7_80",
	isbn          = "978-3-540-78645-0",
	pages         = "689--694",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Using Coherence-Based Measures to Predict Query Difficulty}",
	volume        = 4956,
	year          = 2008,
}