@INPROCEEDINGS{Li:jCAPTCHA:ICCHP2014, author = {Matthew Davidson and Karen Renaud and Shujun Li}, title = {{jCAPTCHA}: Accessible Human Validation}, booktitle = {Computers Helping People with Special Needs: 14th International Conference, ICCHP 2014, Paris, France, July 9-11, 2014, Proceedings, Part I}, series = {Lecture Notes in Computer Science}, volume = {8547}, publisher = {Springer}, pages = {129-136}, year = {2014}, }