Sơn, Trần Thái, and Nguyễn Cát Hồ. “Hedge Algebraic Approach in Construction the Language Scale for Assessment”. Journal of Computer Science and Cybernetics 28, no. 3 (November 8, 2012): 260–273. Accessed April 27, 2024. https://vjs.ac.vn/index.php/jcc/article/view/1266.