TY - JOUR AU - Kubesa, Michael AU - Froncek, Dalibor TI - Problem presented at the workshop in Krynica 2004 JO - Discussiones Mathematicae. Graph Theory PY - 2006 SP - 351 VL - 26 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DMGT_2006_26_2_a15/ LA - en ID - DMGT_2006_26_2_a15 ER -