C1,α Regularity of Viscosity Solutions of Fully Nonlinear Elliptic PDE Under Natural Structure Conditions. Journal of Partial Differential Equations, [S. l.], v. 6, n. 3, p. 193–216, 1993. Disponível em: https://www.global-sci.com/index.php/jpde/article/view/3745. Acesso em: 6 dec. 2025.