BÖGELEIN, V.; HABERMANN, J. Gradient estimates via non standard potentials and continuity. Annales Fennici Mathematici, [S. l.], v. 35, n. 2, p. 641–678, 2010. DOI: 10.5186/aasfm.2010.3541. Disponível em: https://afm.journal.fi/article/view/135331. Acesso em: 25 nov. 2024.