@inproceedings {4908,
	title = {Overview of the TREC 2012 Crowdsourcing Track},
	booktitle = {Text Retrieval Conference (TREC)},
	year = {2012},
	url = {http://trec.nist.gov/pubs/trec21/papers/CROWD12.overview.pdf},
	author = {Mark Smucker and Gabriella Kazai and Matthew Lease}
}
