VITOLO, A. Maximum principles for viscosity solutions of weakly elliptic equations. Bruno Pini Mathematical Analysis Seminar, [S. l.], v. 10, n. 1, p. 110–136, 2019. DOI: 10.6092/issn.2240-2829/10395. Disponível em: https://mathematicalanalysis.unibo.it/article/view/10395. Acesso em: 17 may. 2024.