Arabboev, M., S. Begmatov, and K. Nosirov. “Development of Software for an External Braille Keyboard for Smartphones”. CENTRAL ASIAN JOURNAL OF MATHEMATICAL THEORY AND COMPUTER SCIENCES, Vol. 3, no. 11, Nov. 2022, pp. 60-65, https://cajmtcs.centralasianstudies.org/index.php/CAJMTCS/article/view/283.