Subalgebras and Ideals in BCK/BCI-algebras Based on Uni-hesitant Fuzzy Set Theory. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 11, n. 2, p. 417–430, 2018. DOI: 10.29020/nybg.ejpam.v11i2.3246. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3246. Acesso em: 22 dec. 2024.