PINAMONTI, A.; VALDINOCI, E. A geometric inequality for stable solutions of semilinear elliptic problems in the Engel group. Annales Fennici Mathematici, [S. l.], v. 37, n. 2, p. 357–373, 2012. DOI: 10.5186/aasfm.2012.3733. Disponível em: https://afm.journal.fi/article/view/135401. Acesso em: 20 maj. 2024.