Sajad Shirali-Shahreza, Mohammad Hassan Shirali-Shahreza. Accessibility of CAPTCHA methods. In Yan Chen, Alvaro A. Cárdenas, Rachel Greenstadt, Benjamin I. P. Rubinstein, editors, Proceedings of the 4th ACM Workshop on Security and Artificial Intelligence, AISec 2011, Chicago, IL, USA, October 21, 2011. pages 109-110, ACM, 2011. [doi]
Abstract is missing.