@inproceedings{SIGIR-1998-Callan,
	author        = "James P. Callan",
	booktitle     = "{Proceedings of the 21st International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	cdrom         = "SIGIR1998/P224.pdf",
	doi           = "10.1145/290941.290998",
	pages         = "224--231",
	publisher     = "{ACM}",
	title         = "{Learning While Filtering Focuments}",
	year          = 1998,
}