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@article{MZ_1977__154_172507, author = {Graham H. Williams}, title = {Lipschitz {Continuous} {Solutions} for {Nonlinear} {Obstacle} {Problems.}}, journal = {Mathematische Zeitschrift}, pages = {51--66}, publisher = {mathdoc}, volume = {154}, year = {1977}, zbl = {0351.35028}, url = {http://geodesic.mathdoc.fr/item/MZ_1977__154_172507/} }
Graham H. Williams. Lipschitz Continuous Solutions for Nonlinear Obstacle Problems.. Mathematische Zeitschrift, Tome 154 (1977), pp. 51-66. http://geodesic.mathdoc.fr/item/MZ_1977__154_172507/