%0 Journal Article
%A P. Martín
%A H. Martini
%A M. Spirova
%T Chebyshev Sets and Ball Operators
%J Journal of convex analysis
%D 2014
%P 601-618
%V 21
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JCA_2014_21_3_JCA_2014_21_3_a0/
%F JCA_2014_21_3_JCA_2014_21_3_a0