@inproceedings{CIKM-2004-TakakiFI,
	author        = "Toru Takaki and Atsushi Fujii and Tetsuya Ishikawa",
	booktitle     = "{Proceedings of the 13th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/1031171.1031251",
	isbn          = "1-58113-874-1",
	pages         = "399--405",
	publisher     = "{ACM}",
	title         = "{Associative document retrieval by query subtopic analysis and its application to invalidity patent search}",
	year          = 2004,
}