%0 Journal Article %A I.G. MacDonald %T Affine Root Systems and Dedekind's ?-Function. %J Inventiones mathematicae %D 1971 %P 91-143 %V 15 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1971__15_142124/ %F IM_1971__15_142124