@inproceedings{ECIR-2012-Martinez-AlvarezYR,
	author        = "Miguel Martinez-Alvarez and Sirvan Yahyaei and Thomas Rölleke",
	booktitle     = "{Proceedings of the 34th European Conference on Information Retrieval Research: Advances in Information Retrieval}",
	doi           = "10.1007/978-3-642-28997-2_43",
	isbn          = "978-3-642-28996-5",
	pages         = "468--471",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Semi-automatic Document Classification: Exploiting Document Difficulty}",
	volume        = 7224,
	year          = 2012,
}