SHAVAROVSKYY, B. Z. Selection of regular direct summands from matrix polynomials. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 7, p. 927–934, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5684. Acesso em: 6 dec. 2025.