DE BLASI, F. S.; PIANIGIANI, G. Approximate selections in ${\alpha}$-convex metric spaces and topological degree. Topological Methods in Nonlinear Analysis, [S. l.], v. 24, n. 2, p. 347–375, 2004. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2004.032. Acesso em: 22 jul. 2024.