%0 Journal Article
%A V.S. Sunder
%A Uma Krishnan
%T On Principal Graphs and Weak Duality.
%J Mathematica Scandinavica
%D 1994
%P 49-63
%V 74
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1994__74_1_167280/
%F MS2_1994__74_1_167280