%0 Journal Article %A Victor Nistor %T Cyclic cohomology of crossed products by algebraic. %J Inventiones mathematicae %D 1993 %P 615-638 %V 112 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1993__112_3_144116/ %F IM_1993__112_3_144116