BARREIRA, L.; VALLS, C. Analytic robustness of parameter-dependent perturbations of difference equations. Topological Methods in Nonlinear Analysis, [S. l.], v. 41, n. 2, p. 335–364, 2013. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2013.016. Acesso em: 22 jul. 2024.