Thai, Ta Yen, Hoang Ngo Huy, Dao Van Tuyet, Sergey V. Ablameyko, Nguyen Van Hung, and Doan Van Hoa. “Tonal Languages Speech Synthesis Using an Indirect Pitch Markers and the Quantitative Target Approximation Methods”. Journal of the Belarusian State University. Mathematics and Informatics, no. 3 (November 28, 2019): 105–121. Accessed July 18, 2026. https://journals.bsu.by/index.php/mathematics/article/view/1107.