DAWOOD MOHSEN, D. .; SADIQ JAAFER, E. . On (K-N)*-quasinormal operator. مجلة كلية التربية, [S. l.], v. 18, n. 5, p. 1–12, 2020. Disponível em: https://edumag.uomustansiriyah.edu.iq/index.php/mjse/article/view/313. Acesso em: 5 2026.