STYBORSKI, M. Conley index in Hilbert spaces and the Leray-Schauder degree. Topological Methods in Nonlinear Analysis, [S. l.], v. 33, n. 1, p. 131–148, 2009. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2009.010. Acesso em: 22 jul. 2024.