%0 Journal Article %A Graham H. Williams %T Surfaces of Prescribed Mean Curvature with Inequalities on the Boundary. %J Mathematische Zeitschrift %D 1978 %P 31-52 %V 164 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1978__164_172765/ %F MZ_1978__164_172765