Prabha.P, Lakshmi, Sanjanamenon EJ, Christina Samuel, and Ganga Ramesh. “Low Cost Real Time Braille Keypad for Communication”. International Journal of Engineering & Technology 7, no. 2.8 (March 19, 2018): 77–81. Accessed November 24, 2024. https://sciencepubco.com/index.php/ijet/article/view/10334.