1. William A. Ainsworth A system for converting English text into speech IEEE Transactions on Audio and Electro acoustics, Vol. 21, Issue 3, Jun 1973.
2. G.Devipriya, N.Indumathi, N.Kalaimagal, A.Suriya, J.T.Vasuki, “Hardware Based Braille Pad on Mobile Phone” International Journal of Innovative Research in Computer and Communication Engineering, Vol. 3, Special Issue 2, March 2015, ISSN (online): 2320-9801,ISSN (print): 2320- 9798,Dept. of Electronics and Communication, Narasy’s Sarathy Institute of Technology, Salem, India.
3. Tanay Choudary, Saurabh Kulkarni, Pradyamnu Reddy, “A Braille-Based Mobile Communication and Translation Glove for Deaf-blind People” International Conference on Pervasive Computing (ICPC), 978-1- 4799-6272-3/15/$31.00(C)2015 IEEE. Birla Institute of Technology & Science, Pilani -L.K. Birla Goa Campus India – 403726.
4. Michael McEnancy Finger Reader is audio reading gadget for Index Finger IJECCE Vol. 5, Issue 4 July - 2014
5. Wearable Obstacle Avoidance Electronic Travel Aids for Blind: A Survey