Xiaokui Chen, Xinqing Lin. Research and Implementation of CAPTCHA Based on Ajax. In Zhixiang Yin, Linqiang Pan, Xianwen Fang, editors, Proceedings of The Eighth International Conference on Bio-Inspired Computing: Theories and Applications, BIC-TA 2013, HuangShan, China, July 12-14, 2013. Volume 212 of Advances in Intelligent Systems and Computing, pages 471-476, Springer, 2013. [doi]
Abstract is missing.