%0 Journal Article %A Hell, Pavol %T Rigid undirected graphs with given number of vertices %J Commentationes Mathematicae Universitatis Carolinae %D 1968 %P 51-69 %V 9 %N 1 %U http://geodesic.mathdoc.fr/item/CMUC_1968_9_1_a5/ %G en %F CMUC_1968_9_1_a5