FRANDSEN, G. S.; SANKOWSKI, P. Dynamic Normal Forms and Dynamic Characteristic Polynomial. BRICS Report Series, [S. l.], v. 15, n. 2, 2008. DOI: 10.7146/brics.v15i2.21937. Disponível em: https://tidsskrift.dk/brics/article/view/21937. Acesso em: 21 nov. 2024.