On Interval-Valued Fuzzy on Ideal Sets. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 12, n. 2, p. 553–570, 2019. DOI: 10.29020/nybg.ejpam.v12i2.3418. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3418.. Acesso em: 27 may. 2024.