DI DONATO, D. Intrinsic Lipschitz graphs in Carnot groups of step 2. Annales Fennici Mathematici, [S. l.], v. 45, n. 2, p. 1013–1063, 2020. DOI: 10.5186/aasfm.2020.4556. Disponível em: https://afm.journal.fi/article/view/135898. Acesso em: 20 maj. 2024.