BONFIGLIOLI, A. Algebras of Complete Hörmander Vector Fields, and Lie-Group Construction. Bruno Pini Mathematical Analysis Seminar, [S. l.], v. 5, n. 1, p. 15–30, 2014. DOI: 10.6092/issn.2240-2829/4707. Disponível em: https://mathematicalanalysis.unibo.it/article/view/4707. Acesso em: 26 apr. 2024.