@inproceedings{DRR-2003-ChewB,
	author        = "Monica Chew and Henry S. Baird",
	booktitle     = "{Proceedings of the 10th Conference on Document Recognition and Retrieval}",
	ee            = "http://www.imaging.org/store/epub.cfm?abstrid=22585",
	isbn          = "0-8194-4810-9",
	pages         = "305--316",
	publisher     = "{SPIE}",
	series        = "{SPIE Proceedings}",
	title         = "{BaffleText: a human interactive proof}",
	volume        = 5010,
	year          = 2003,
}