On Semilattice Congruences on Hypersemigroups and on Ordered Hypersemigroups. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 11, n. 2, p. 476–492, 2018. DOI: 10.29020/nybg.ejpam.v11i2.3266. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3266. Acesso em: 22 dec. 2024.