ZHAO, X. Liouville type theorem for nonlinear boundary value problem on Heisenberg group. Annales Fennici Mathematici, [S. l.], v. 42, n. 2, p. 723–733, 2017. DOI: 10.5186/aasfm.2017.4243. Disponível em: https://afm.journal.fi/article/view/135689. Acesso em: 20 touko. 2024.