Characterization by Symmetry of Solutions of a Nonlinear Subelliptic Equation on the Heisenberg Group. Journal of Mathematical Study, [S. l.], v. 50, n. 1, p. 17–27, 2017. DOI: 10.4208/jms.v50n1.17.02. Disponível em: https://global-sci.com/index.php/jms/article/view/13289. Acesso em: 6 dec. 2025.