%0 Journal Article %A R.M. Hain %A S. Zucker %T Unipotent variations of mixed Hodge structure. %J Inventiones mathematicae %D 1987 %P 83-124 %V 88 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1987__88_143446/ %F IM_1987__88_143446