PRABHA.P, Lakshmi; EJ, Sanjanamenon; SAMUEL, Christina; RAMESH, Ganga. Low cost real time braille keypad for communication. International Journal of Engineering and Technology, [S. l.], v. 7, n. 2.8, p. 77–81, 2018. DOI: 10.14419/ijet.v7i2.8.10334. Disponível em: https://mail.sciencepubco.com/index.php/IJET/article/view/10334.. Acesso em: 13 may. 2025.