TY - JOUR AU - Imrich, Wilfried AU - Klöckl, Werner TI - Factoring directed graphs with respect to the cardinal product in polynomial time II JO - Discussiones Mathematicae. Graph Theory PY - 2010 SP - 461 EP - 474 VL - 30 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DMGT_2010_30_3_a8/ LA - en ID - DMGT_2010_30_3_a8 ER -