1.
W2,ploc(\Omega)\cap C1,α(\bar Ω) Viscosity Solutions of Neumann Problems for Fully Nonlinear Elliptic Equations. J. Part. Diff. Eq. 1995;8(3):219-232. Accessed December 5, 2025. https://www.global-sci.com/index.php/jpde/article/view/3797