MATTILA, P.; SERAPIONI, R.; SERRA CASSANO, F. Characterizations of intrinsic rectifiability in Heisenberg groups. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 9, n. 4, p. 687-723, 2010. DOI: 10.2422/2036-2145.2010.4.02. Disponível em: http://20.103.181.36/index.php/annaliscienze/article/view/218. Acesso em: 28 may. 2025.