%0 Journal Article
%A C. Nour
%A R. J. Stern
%A J. Takche
%T Proximal Smoothness and the Exterior Sphere Condition
%J Journal of convex analysis
%D 2009
%P 501-514
%V 16
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JCA_2009_16_2_JCA_2009_16_2_a10/
%F JCA_2009_16_2_JCA_2009_16_2_a10