Intuitionistic Fuzzy Structures on Sheffer Stroke UP-algebras. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 18, n. 1, p. 5627, 2025. DOI: 10.29020/nybg.ejpam.v18i1.5627. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/5627. Acesso em: 5 dec. 2025.