@inproceedings{CHI-2013-Shirali-ShahrezaPBG,
	author        = "Sajad Shirali-Shahreza and Gerald Penn and Ravin Balakrishnan and Yashar Ganjali",
	booktitle     = "{Proceedings of the 31st ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/2470654.2481295",
	isbn          = "978-1-4503-1899-0",
	pages         = "2147--2156",
	publisher     = "{ACM}",
	title         = "{SeeSay and HearSay CAPTCHA for mobile interaction}",
	year          = 2013,
}