Hồ, Nguyễn Cát, and Nguyễn Văn Long. “Complete Hedge Algebras Based on Limit-Elements”. Journal of Computer Science and Cybernetics 19, no. 1 (July 26, 2012): 62–71. Accessed December 23, 2025. https://vjs.ac.vn/jcc/article/view/1521.