DORE, Giovanni. Semigroups generated by first order differential operators. Bruno Pini Mathematical Analysis Seminar, [S. l.], v. 16, n. 1, p. 189–203, 2025. DOI: 10.60923/issn.2240-2829/24293. Disponível em: https://mathematicalanalysis.unibo.it/article/view/24293. Acesso em: 23 mar. 2026.