@inproceedings{SIGIR-2004-FujiiIK,
	author        = "Atsushi Fujii and Makoto Iwayama and Noriko Kando",
	booktitle     = "{Proceedings of the 27th International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/1008992.1009120",
	isbn          = "1-58113-881-4",
	pages         = "560--561",
	publisher     = "{ACM}",
	title         = "{The patent retrieval task in the fourth NTCIR workshop}",
	year          = 2004,
}