D. MAHMOOD, R.; A. ABD, M. On Rings whose Maximal Ideals are GP-Ideals. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 2, n. 2, p. 27–31, 2005. DOI: 10.33899/csmj.2005.164080 . Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36815. Acesso em: 18 dec. 2025.