PILYUGIN, Sergei Yu.; RIEGER, Janosch. Shadowing and inverse shadowing in set-valued dynamical systems. Contractive case. Topological Methods in Nonlinear Analysis, [S. l.], v. 32, n. 1, p. 139–149, 2008. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2008.041. Acesso em: 8 jul. 2025.