Mohammad Shirali-Shahreza, Sajad Shirali-Shahreza. A CAPTCHA system for Nintendo DS. In Mark Claypool, editor, Proceedings of the 7th ACM SIGCOMM Workshop on Network and System Support for Games, NETGAMES 2008, Worcester, Massachusetts, USA, October 21-22, 2008. pages 104-105, ACM, 2008. [doi]
Abstract is missing.