@inproceedings{SIGIR-1993-QiuF,
	author        = "Yonggang Qiu and Hans-Peter Frei",
	booktitle     = "{Proceedings of the 16th International ACM SIGIR Conference on Research and Development in Information Retrieval (Special Issue of the SIGIR Forum)}",
	cdrom         = "SIGIR1993/P160.pdf",
	doi           = "10.1145/160688.160713",
	isbn          = "0-89791-605-0",
	pages         = "160--169",
	publisher     = "{ACM}",
	title         = "{Concept Based Query Expansion}",
	year          = 1993,
}