@inproceedings{CIKM-2009-MaCQG,
	author        = "Hao Ma and Raman Chandrasekar and Chris Quirk and Abhishek Gupta",
	booktitle     = "{Proceedings of the 18th ACM International Conference on Information and Knowledge Management}",
	doi           = "10.1145/1645953.1645990",
	isbn          = "978-1-60558-512-3",
	pages         = "275--284",
	publisher     = "{ACM}",
	title         = "{Improving search engines using human computation games}",
	year          = 2009,
}