GUTLYANSKII, V.; RYAZANOV, V. On boundary correspondence under quasiconformal mappings. Annales Fennici Mathematici, [S. l.], v. 21, n. 1, p. 167–178, 1996. Disponível em: https://afm.journal.fi/article/view/134860. Acesso em: 14 apr. 2025.