%0 Journal Article
%A G. Chartrand
%A M. Behzad
%T Line-Coloring of Signed Graphs.
%J Elemente der Mathematik
%D 1969
%P 49-52
%V 24
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ELMA_1969__24_140926/
%F ELMA_1969__24_140926