@inproceedings{CIKM-2012-LvZ,
	author        = "Yuanhua Lv and ChengXiang Zhai",
	booktitle     = "{Proceedings of the 21st ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/2396761.2398520",
	isbn          = "978-1-4503-1156-4",
	pages         = "1799--1803",
	publisher     = "{ACM}",
	title         = "{Query likelihood with negative query generation}",
	year          = 2012,
}