H. SHUKER, N.; D. MAHMOOD, R. On Generalized Simple P-injective Rings. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 2, n. 1, p. 21–26, 2005. DOI: 10.33899/csmj.2005.164064 . Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36339. Acesso em: 18 dec. 2025.