THẠNH, L. M.; PHONG, T. N. Some approaches that define semantics of deductive database. Journal of Computer Science and Cybernetics, [S. l.], v. 18, n. 1, 2012. DOI: 10.15625/1813-9663/18/1/2415. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/2415. Acesso em: 8 may. 2024.