AGARWAL, R. P.; O’REGAN, D.; PRECUP, R. Fixed point theory and generalized Leray-Schauder alternatives for approximable maps in topological vector spaces. Topological Methods in Nonlinear Analysis, [S. l.], v. 22, n. 1, p. 193–202, 2003. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2003.036. Acesso em: 4 dec. 2024.