THI, V. Đức. Some results about the third normal form for relation scheme. Journal of Computer Science and Cybernetics, [S. l.], v. 15, n. 1, p. 62–65, 2016. DOI: 10.15625/1813-9663/15/1/7754. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/7754. Acesso em: 1 may. 2024.