TUKIA, P. A quasiconformal group not isomorphic to a Möbius group. Annales Fennici Mathematici, [S. l.], v. 6, n. 1, p. 149–160, 1981. DOI: 10.5186/aasfm.1981.0625. Disponível em: https://afm.journal.fi/article/view/134406. Acesso em: 14 apr. 2025.