KOVALEV, L. V.; ONNINEN, J. An N-dimensional version of the Beurling-Ahlfors extension. Annales Fennici Mathematici, [S. l.], v. 36, n. 1, p. 321–329, 2011. DOI: 10.5186/aasfm.2011.3620. Disponível em: https://afm.journal.fi/article/view/135352. Acesso em: 25 nov. 2024.