ATANASSOV, K.; KACPRZYK, J. Bipolar Fuzzy Sets Are Intuitionistic Fuzzy Sets. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 77, n. 12, p. 1752–1756, 2024. DOI: 10.7546/CRABS.2024.12.02. Disponível em: https://proceedings.bas.bg/index.php/cr/article/view/658. Acesso em: 15 jan. 2025.