Sơn, Trần Thái, Đỗ Nam Tiến, and Phạm Đình Phong. “Asssociate Rull Using Heldge Algebra Approach”. Journal of Computer Science and Cybernetics 27, no. 4 (May 3, 2012): 341–352. Accessed April 27, 2024. https://vjs.ac.vn/index.php/jcc/article/view/598.