Sơn, Trần Thái, and Nguyễn Cát Hồ. “Hedge Algebraic Approach in Construction the Language Scale for Assessment”. <i>Journal of Computer Science and Cybernetics</i> 28, no. 3 (November 8, 2012): 260–273. Accessed December 5, 2025. https://vjs.ac.vn/jcc/article/view/1266.