ORTEGA, R.; TARALLO, M. Massera’s theorem for quasi-periodic differential equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 19, n. 1, p. 39–61, 2002. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2002.003. Acesso em: 22 lip. 2024.