%0 Journal Article %A Skupień, Zdzisław %T Sums of Powered Characteristic Roots Count Distance-Independent Circular Sets %J Discussiones Mathematicae. Graph Theory %D 2013 %P 217-229 %V 33 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMGT_2013_33_1_a17/ %G en %F DMGT_2013_33_1_a17