[1]
Thắng, Đặng Q., Hân, N. Đình and Huy, P.T. 2012. Determining unambiguous degree of regular languages by automata. Journal of Computer Science and Cybernetics. 28, 1 (Jun. 2012), 53–64. DOI:https://doi.org/10.15625/1813-9663/28/1/1065.