Long, Nguyễn Văn, and Nguyễn Cát Hồ. “Basic Properties of Fuzziness Degrees for Linguistic Hedge”. Journal of Computer Science and Cybernetics 20, no. 1 (July 25, 2012): 64–72. Accessed November 5, 2025. https://jcc.vast.vn/jcc/article/view/1459.