SARVAS, J. On the local behavior of quasiregular mappings. Annales Fennici Mathematici, [S. l.], v. 1, n. 2, p. 221–226, 1975. DOI: 10.5186/aasfm.1975.0120. Disponível em: https://afm.journal.fi/article/view/134256. Acesso em: 14 apr. 2025.