%0 Journal Article
%A Luis A. Caffarelli
%A Lavi Karp
%A Henrik Shahgholian
%T Regularity of a free boundary with application to the Pompeiu problem
%J Annals of mathematics
%D 2000
%V 151
%N 1
%U http://geodesic.mathdoc.fr/articles/10.2307/121117/
%R 10.2307/121117
%F 10_2307_121117