MIKITYUK , Ya. V.; AL-TUNZHI , M. Multiplication operator on a matrix polynomial . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 9, p. 1287–1289, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8184. Acesso em: 14 apr. 2025.