JEZIERSKI, J.; KEPPELMANN, E.; MARZANTOWICZ, W. Wecken property for periodic points on the Klein bottle. Topological Methods in Nonlinear Analysis, [S. l.], v. 33, n. 1, p. 51–64, 2009. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2009.005. Acesso em: 22 jul. 2024.