PIĘKOSZ, A. Basic definitions and properties of topological branched coverings. Topological Methods in Nonlinear Analysis, [S. l.], v. 8, n. 2, p. 359–370, 1996. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1996.039. Acesso em: 22 lip. 2024.