TRALLI, Giulio. Symmetry problems for gauge balls in the Heisenberg group. Bruno Pini Mathematical Analysis Seminar, [S. l.], v. 15, n. 1, p. 79–97, 2024. DOI: 10.6092/issn.2240-2829/21056. Disponível em: https://mathematicalanalysis.unibo.it/article/view/21056. Acesso em: 18 jan. 2025.