M. SABIR, A.; أحمد. The Numerical Range of 6 Χ 6 Irreducible Matrices. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 4, n. 2, p. 89–98, 2025. Disponível em: https://rjps.uomosul.edu.iq/index.php/csmj/article/view/19642. Acesso em: 3 aug. 2025.