%0 Journal Article %A R. MacPherson %A K. Vilonen %T Elementary construction of perverse sheaves. %J Inventiones mathematicae %D 1986 %P 403-436 %V 84 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1986__84_143344/ %F IM_1986__84_143344