THẮNG, Đặng Q.; HÂN, N. Đình; HUY, P. T. Determining unambiguous degree of regular languages by automata. Journal of Computer Science and Cybernetics, [S. l.], v. 28, n. 1, p. 53–64, 2012. DOI: 10.15625/1813-9663/28/1/1065. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/1065. Acesso em: 8 may. 2024.