GAULD, D.; VÄISÄLÄ, J. Lipschitz and quasiconformal flattening of spheres and cells. Annales Fennici Mathematici, [S. l.], v. 4, n. 2, p. 371–382, 1979. DOI: 10.5186/aasfm.1978-79.0405. Disponível em: https://afm.journal.fi/article/view/134361. Acesso em: 25 nov. 2024.