Phong, Phan Anh, Đinh Khắc Đông, and Trần Đình Khang. “A Method for Constructing Hedge Algebraic Type-2 Fuzzy Logic Systems”. <i>Journal of Computer Science and Cybernetics</i> 27, no. 2 (April 26, 2012): 119–131. Accessed November 4, 2025. https://jcc.vast.vn/jcc/article/view/496.