ASTALA, K.; HEINONEN, J. On quasiconformal rigidity in space and plane. Annales Fennici Mathematici, [S. l.], v. 13, n. 1, p. 81–92, 1988. DOI: 10.5186/aasfm.1988.1301. Disponível em: https://afm.journal.fi/article/view/134614. Acesso em: 25 nov. 2024.