M. SABIR, A. Joint Numerical Range of Matrix Polynomials. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 6, n. 2, p. 129–136, 2009. DOI: 10.33899/csmj.2009.163803 . Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36393. Acesso em: 18 dec. 2025.