Fuzzy bi-ideals and fuzzy quasi-ideals in ordered semirings. Gulf Journal of Mathematics, [S. l.], v. 2, n. 4, 2014. DOI: 10.56947/gjom.v2i4.208. Disponível em: https://www.gjom.org/index.php/gjom/article/view/208. Acesso em: 28 oct. 2026.