THUẦN, H.; HÀ, H. C. An approach to extending the relational database model for handling incomplete information and data dependencies. Journal of Computer Science and Cybernetics, [S. l.], v. 17, n. 3, p. 41–47, 2012. DOI: 10.15625/1813-9663/17/3/2624. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/2624. Acesso em: 3 may. 2024.