QI, L.; YUAN, R. Coincidence degree methods in almost periodic differential equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 50, n. 1, p. 185–216, 2017. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2017.026. Acesso em: 22 jul. 2024.