[1]
“Strong Solution of the Obstacle Problem for Fully Nonlinear Elliptic Equations”, J. Part. Diff. Eq., vol. 4, no. 3, pp. 15–34, Apr. 1991, Accessed: Dec. 06, 2025. [Online]. Available: https://www.global-sci.com/index.php/jpde/article/view/3684