THỦY, N. T.; HIỆU, P. D. About reasoning operators in knowledge systems of F-rules. Journal of Computer Science and Cybernetics, [S. l.], v. 18, n. 1, 2012. DOI: 10.15625/1813-9663/18/1/2412. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/2412. Acesso em: 5 may. 2024.