Bipolar Fuzzy Commutative Ideals in BCK-algebras. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 17, n. 3, p. 1831–1841, 2024. DOI: 10.29020/nybg.ejpam.v17i3.5255. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/5255. Acesso em: 22 dec. 2024.