THI, Vu Duc. On the Hypergraphs and candidate keys. <b>Journal of Computer Science and Cybernetics</b>, <i>[S. l.]</i>, v. 13, n. 4, p. 98–102, 2016. DOI: 10.15625/1813-9663/13/4/8038. Disponível em: https://jcc.vast.vn/jcc/article/view/8038. Acesso em: 4 nov. 2025.