%0 Journal Article
%A J.M. Borwein
%T A Lagrange multiplier theorem and a sandwich theorem for convex relations.
%J Mathematica Scandinavica
%D 1981
%P 189-204
%V 48
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1981__48_166749/
%F MS2_1981__48_166749