%0 Journal Article %A Uffe Haagerup %T On the dual weights for crossed products of von Neumann algebras I. %J Mathematica Scandinavica %D 1978 %P 99-118 %V 43 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1978__43_166607/ %F MS2_1978__43_166607