O. DAKHEEL, Shireen. On skew C1C2-Symmetric operators. Pure Sciences International Journal of Kerbala, [S. l.], v. 2, n. 6, p. 66–70, 2025. Disponível em: https://journals.uokerbala.edu.iq/index.php/psijk/article/view/3606. Acesso em: 17 apr. 2026.