THI, V. D. Some problems on the functional dependency related to armstrong relations in the relational datamodel. Journal of Computer Science and Cybernetics, [S. l.], v. 14, n. 1, p. 1–8, 2016. DOI: 10.15625/1813-9663/14/1/7876. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/7876. Acesso em: 3 may. 2024.