NÄKKI, R.; PALKA, B. Hyperbolic geometry and Hölder continuity of conformal mappings. Annales Fennici Mathematici, [S. l.], v. 10, n. 1, p. 433–444, 1985. DOI: 10.5186/aasfm.1985.1047. Disponível em: https://afm.journal.fi/article/view/134542. Acesso em: 25 nov. 2024.