THI, V. Đức. Some results related to the minimal armstrong relation for relation scheme. Journal of Computer Science and Cybernetics, [S. l.], v. 15, n. 4, p. 26–30, 2016. DOI: 10.15625/1813-9663/15/4/7782. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/7782. Acesso em: 4 may. 2024.