Some Structural Properties of Fully UP-semigroups. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 12, n. 4, p. 1483–1496, 2019. DOI: 10.29020/nybg.ejpam.v12i4.3527. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3527.. Acesso em: 2 may. 2024.