%0 Journal Article %A A. Ramanathan %A G.R. Kempf %T Multi-cones over Schubert varieties %J Inventiones mathematicae %D 1987 %P 353-364 %V 87 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1987__87_143423/ %F IM_1987__87_143423