1. Census of India 2011, 2011. http://www.censusindia.gov.in /2011census/ population_enumeration.html
2. Y. Zhu, Z. Yang and B. Yuan 2013.Vision Based Hand Gesture Recognition.In Proceedings of the International Conference on Service Sciences (ICSS). Shenzhen, 260--265.
3. P. Vijayalakshmi, M. Aarthi 2016. Sign language to speech conversion. In Proceedings of the International Conference on Recent Trends in Information Technology (ICRTIT).
4. M. Geetha, Menon, R., Jayan, S., James, R., and Janardhan, G. V. V. 2011.Gesture recognition for American sign language with polygon approximation. In Proceedings - IEEE International Conference on Technology for Education, T4E. Chennai, Tamil Nadu, 241--245.
5. K. K. Dutta, Satheesh Kumar Raju K., Anil Kumar G. S. and Sunny Arokia Swamy B. 2015. Double handed Indian Sign Language to speech and text. In Proceedings of the Third International Conference on Image Information Processing (ICIIP). Waknaghat, 374--377.