Existence of C1-solutions to Certain Non-uniformly Degenerate Elliptic Equations. Journal of Partial Differential Equations, [S. l.], v. 11, n. 1, p. 9–24, 1998. Disponível em: https://www.global-sci.com/index.php/jpde/article/view/3871. Acesso em: 6 dec. 2025.