%0 Journal Article
%A Imrich, Wilfried
%A Klöckl, Werner
%T Factoring directed graphs with respect to the cardinal product in polynomial time
%J Discussiones Mathematicae. Graph Theory
%D 2007
%P 593-601
%V 27
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DMGT_2007_27_3_a16/
%G en
%F DMGT_2007_27_3_a16