MAGNANI, V. Some remarks on densities in the Heisenberg group. Annales Fennici Mathematici, [S. l.], v. 42, n. 1, p. 357–365, 2017. DOI: 10.5186/aasfm.2017.4217. Disponível em: https://afm.journal.fi/article/view/135666. Acesso em: 22 nov. 2024.