@inproceedings{CIKM-2005-TaoWMZ,
	author        = "Tao Tao and Xuanhui Wang and Qiaozhu Mei and ChengXiang Zhai",
	booktitle     = "{Proceedings of the 14th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/1099554.1099623",
	isbn          = "1-59593-140-6",
	pages         = "273--274",
	publisher     = "{ACM}",
	title         = "{Accurate language model estimation with document expansion}",
	year          = 2005,
}