W2,ploc(\Omega)\cap C1,α(\bar Ω) Viscosity Solutions of Neumann Problems for Fully Nonlinear Elliptic Equations. Journal of Partial Differential Equations, [S. l.], v. 8, n. 3, p. 219–232, 1995. Disponível em: https://global-sci.com/index.php/jpde/article/view/3797. Acesso em: 6 dec. 2025.