@inproceedings{SIGIR-2007-XuWL,
	author        = "Jingfang Xu and Sheng Wu and Xing Li",
	booktitle     = "{Proceedings of the 30th International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/1277741.1277910",
	isbn          = "978-1-59593-597-7",
	pages         = "789--790",
	publisher     = "{ACM}",
	title         = "{Estimating collection size with logistic regression}",
	year          = 2007,
}