Some properties of the maximal graph related to co-ideal of a commutative semiring. Journal of Prime Research in Mathematics, [S. l.], v. 16, n. 1, p. 1–10, 2020. Disponível em: https://jprm.sms.edu.pk/index.php/jprm/article/view/148. Acesso em: 30 aug. 2025.