%0 Journal Article %A Alan Adolphson %A Steven Sperber %T Exponential sums on (Gm)n. %J Inventiones mathematicae %D 1990 %P 63-80 %V 101 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1990__101_2_143798/ %F IM_1990__101_2_143798