TANG, Jian; GU, Ze; XIE, Xiangyun. A further study on the hyperideals of ordered semihypergroups. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 43, p. 447–470, 2020. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7327. Acesso em: 6 nov. 2026.