%0 Journal Article
%A N. M. Nam
%A N. Hoang
%T A Generalized Sylvester Problem and a Generalized Fermat-Torricelli Problem
%J Journal of convex analysis
%D 2013
%P 669-687
%V 20
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JCA_2013_20_3_JCA_2013_20_3_a3/
%F JCA_2013_20_3_JCA_2013_20_3_a3