%0 Journal Article %A Sekanina, Milan %T Graphs and Betweeness %J Mathematica slovaca %D 1975 %P 41-47 %V 25 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1975__25_1_a3/ %G en %F MASLO_1975__25_1_a3