ANDRES, J.; FÜRST, T.; PASTOR, K. Sharkovskii’s theorem, differential inclusions, and beyond. Topological Methods in Nonlinear Analysis, [S. l.], v. 33, n. 1, p. 149–168, 2009. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2009.011. Acesso em: 3 jul. 2024.