PROKIP, V. M. On the uniqueness of the unital divisor of a matrix polynomial over an arbitrary field. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 6, p. 803–808, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5869. Acesso em: 5 dec. 2025.