THUY, N. T.; HUY, N. X. On some algorithms for the division in the relational data models. Journal of Computer Science and Cybernetics, [S. l.], v. 1, n. 4, p. 1–6, 2015. DOI: 10.15625/1813-9663/1/4/6697. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/6697. Acesso em: 6 may. 2024.