NOLDER, C. A. Lipschitz classes of solutions to certain elliptic equations. Annales Fennici Mathematici, [S. l.], v. 17, n. 2, p. 211–219, 1992. DOI: 10.5186/aasfm.1992.1729. Disponível em: https://afm.journal.fi/article/view/134753. Acesso em: 25 nov. 2024.