ANTONELLI, G.; MERLO, A. Intrinsically Lipschitz functions with normal target in Carnot groups. Annales Fennici Mathematici, [S. l.], v. 46, n. 1, p. 571–579, 2021. Disponível em: https://afm.journal.fi/article/view/109691. Acesso em: 16 sep. 2024.