KRYSZEWSKI, W.; MEDERSKI, J. Fixed point index for Krasnosel’skii-type set-valued maps on complete ANRs. Topological Methods in Nonlinear Analysis, [S. l.], v. 28, n. 2, p. 335–384, 2006. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2006.033. Acesso em: 22 jul. 2024.