Comparison Principles for Some Fully Nonlinear Sub-Elliptic Equations on the Heisenberg Group. Analysis in Theory and Applications, [S. l.], v. 35, n. 3, p. 312–334, 2019. DOI: 10.4208/ata.OA-0010. Disponível em: https://global-sci.com/index.php/ata/article/view/8173. Acesso em: 5 dec. 2025.