%0 Journal Article
%A L.A. Caffarelli
%T The Obstacle Problem Revisited.
%J The journal of Fourier analysis and applications
%D 1998
%P 383-402
%V 4
%N 2
%U http://geodesic.mathdoc.fr/item/JFAA_1998__4_2_59573/
%F JFAA_1998__4_2_59573