DAVVAZ, B.; OMIDI, S. FOUNDATIONS OF ORDERED (SEMI)HYPERRINGS. Journal of the Indonesian Mathematical Society, [S. l.], v. 22, n. 2, p. 131–150, 2017. DOI: 10.22342/jims.22.2.233.131-150. Disponível em: https://jims-a.org/index.php/jimsa/article/view/233. Acesso em: 30 apr. 2024.