ŻOŁĄDEK, Henryk. Note on the deck transformations group and the monodromy group. Topological Methods in Nonlinear Analysis, [S. l.], v. 19, n. 2, p. 237–256, 2002. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2002.012. Acesso em: 3 jul. 2025.