CHANGPHAS, Thawhat; DAVVAZ, Bijan. BI-HYPERIDEALS AND QUASI-HYPERIDEALS IN ORDERED SEMIHYPERGROUPS. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 35, p. 493–508, 2015. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6404. Acesso em: 16 aug. 2026.