%0 Journal Article
%A Oystein Ore
%T A problem regarding the tracing of graphs.
%J Elemente der Mathematik
%D 1951
%P 49-53
%V 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ELMA_1951__6_140566/
%F ELMA_1951__6_140566