On Some Properties of Doubt Bipolar Fuzzy H-ideals in BCK/BCI-algebras. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 11, n. 3, p. 652–670, 2018. DOI: 10.29020/nybg.ejpam.v11i3.3288. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3288.. Acesso em: 27 may. 2024.