Huy, Nguyen Van, Luong Chi Mai, Vu Tat Thang, and Do Quoc Truong. “Vietnamese Recognition Using Tonal Phoneme Based on Multi Space Distribution”. Journal of Computer Science and Cybernetics 30, no. 1 (May 13, 2014): 28–38. Accessed December 5, 2025. https://vjs.ac.vn/jcc/article/view/3553.