%0 Journal Article %A Angelo Vistoli %T The number of reducible hypersurfaces in a pencil. %J Inventiones mathematicae %D 1993 %P 247-262 %V 112 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1993__112_3_144103/ %F IM_1993__112_3_144103