S. MAHMOOD, A.; عمار. On the Rings of Differential Operators. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 3, n. 1, p. 117–126, 2025. Disponível em: https://rjps.uomosul.edu.iq/index.php/csmj/article/view/20043. Acesso em: 5 aug. 2025.