KIM, I.-S. The invariance of domain theorem for condensing vector fields. Topological Methods in Nonlinear Analysis, [S. l.], v. 25, n. 2, p. 363–373, 2005. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2005.018. Acesso em: 22 lip. 2024.