Kharchenko, Volodymyr, and Iurii Chyrka. “TYPED DIGITS RECOGNITION USING SEQUENTIAL PROBABILITY RATIO TEST”. Proceedings of National Aviation University 74, no. 1 (February 1, 2018): 38–44. Accessed June 4, 2023. https://jrnl.nau.edu.ua/index.php/visnik/article/view/12286.