%0 Journal Article %A Chvátal, Václav %T Some relations among invariants of graphs %J Czechoslovak Mathematical Journal %D 1971 %P 366-368 %V 21 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1971.101034/ %R 10.21136/CMJ.1971.101034 %G en %F 10_21136_CMJ_1971_101034