Cường, Bùi Công, Tống Hòang Anh, and Bùi Dương Hải. “Some Operations on Type-2 Intuitionistic Fuzzy Sets”. <i>Journal of Computer Science and Cybernetics</i> 28, no. 3 (December 28, 2012): 274–283. Accessed November 5, 2025. https://jcc.vast.vn/jcc/article/view/2607.