OBUKHOVSKIĬ, V.; STAROVA, T. On stability of fixed points of multivalued maps. Topological Methods in Nonlinear Analysis, [S. l.], v. 17, n. 1, p. 133–141, 2001. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2001.009. Acesso em: 26 apr. 2024.