PETROV, Alexey A.; PILYUGIN, Sergei Yu. Lyapunov functions, shadowing and topological stability. Topological Methods in Nonlinear Analysis, [S. l.], v. 43, n. 1, p. 231–240, 2016. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2014.013. Acesso em: 8 jul. 2025.