KEHAYOPULU, Niovi. On fuzzy po-Γ-semigroups. Armenian Journal of Mathematics, Yerevan, Armenia, v. 6, n. 2, p. 43–52, 2015. Disponível em: https://armjmath.sci.am/index.php/ajm/article/view/102. Acesso em: 4 apr. 2025.