D. MAHMOOD, R.; B. MAHMOOD, A. On Rings whose Maximal Essential Ideals are Pure. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 4, n. 1, p. 57–62, 2007. DOI: 10.33899/csmj.2007.163995 . Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/37038. Acesso em: 17 dec. 2025.