DZEDZEJ, Zdzisław; GABOR, Grzegorz. On homotopy Conley index for multivalued flows in Hilbert spaces. Topological Methods in Nonlinear Analysis, [S. l.], v. 38, n. 1, p. 187–205, 2011. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2011.028. Acesso em: 8 jul. 2025.