@inproceedings{ECIR-2011-TakamuraYO,
	author        = "Hiroya Takamura and Hikaru Yokono and Manabu Okumura",
	booktitle     = "{Proceedings of the 33rd European Conference on Information Retrieval Research: Advances in Information Retrieval}",
	doi           = "10.1007/978-3-642-20161-5_18",
	isbn          = "978-3-642-20160-8",
	pages         = "177--188",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Summarizing a Document Stream}",
	volume        = 6611,
	year          = 2011,
}