%0 Journal Article
%A Marcin Studniarski
%T An Algorithm for Calculating One Subgradient of a Convex Function of Two Variables.
%J Numerische Mathematik
%D 1987
%P 685-694
%V 55
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NUMA_1987__55_4_133377/
%F NUMA_1987__55_4_133377