%0 Journal Article %A Xuding Zhu %T Graphs with chromatic numbers strictly less than their colouring numbers %J Ars Mathematica Contemporanea %D 2011 %P 25-27 %V 4 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.176.704/ %R 10.26493/1855-3974.176.704 %G en %F 10_26493_1855_3974_176_704