%0 Journal Article %A George Lusztig %T On the Unipotent Characters of the Exceptional Groups Over Finite Fields. %J Inventiones mathematicae %D 1980 %P 173-192 %V 60 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1980__60_142746/ %F IM_1980__60_142746