@inproceedings{CIKM-2011-XingZZ,
	author        = "Qianli Xing and Yi Zhang and Lanbo Zhang",
	booktitle     = "{Proceedings of the 20th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/2063576.2063866",
	isbn          = "978-1-4503-0717-8",
	pages         = "1965--1968",
	publisher     = "{ACM}",
	title         = "{On bias problem in relevance feedback}",
	year          = 2011,
}