TRUNG, Phạm Quang. Some problems for join dependency and project-join normal form. <b>Journal of Computer Science and Cybernetics</b>, <i>[S. l.]</i>, v. 17, n. 1, p. 89–96, 2012. DOI: 10.15625/1813-9663/17/1/2435. Disponível em: https://jcc.vast.vn/jcc/article/view/2435. Acesso em: 5 nov. 2025.