THUẦN, Hồ; SOUAD, Souafi; DJAMILA, Mohamed Benkada. Some more properties and remarks about keys for relation scheme. <b>Journal of Computer Science and Cybernetics</b>, <i>[S. l.]</i>, v. 12, n. 4, p. 101–113, 2016. DOI: 10.15625/1813-9663/12/4/8097. Disponível em: https://jcc.vast.vn/jcc/article/view/8097. Acesso em: 4 nov. 2025.