KUNAL SHAH, SAVITA INGLE, Y. V. G. M. S. . L. A. roy,. BRAILLE CALCULATOR. International Journal of Engineering and Computer Science, india, v. 2, n. 02, 2017. Disponível em: http://ijecs.in/index.php/ijecs/article/view/218. Acesso em: 17 jun. 2024.