TY - JOUR AU - Skupień, Zdzisław TI - Sums of Powered Characteristic Roots Count Distance-Independent Circular Sets JO - Discussiones Mathematicae. Graph Theory PY - 2013 SP - 217 EP - 229 VL - 33 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DMGT_2013_33_1_a17/ LA - en ID - DMGT_2013_33_1_a17 ER -