TUYEN, T. M.; THANG, T. D.; HUY, N. X. Some properties of the positive boolean dependencies in the database model of block form. Journal of Computer Science and Cybernetics, [S. l.], v. 31, n. 2, p. 159–169, 2015. DOI: 10.15625/1813-9663/31/2/4978. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/4978. Acesso em: 17 apr. 2024.