%0 Journal Article %A Knebusch, Anselm %A Linnell, Peter %A Schick, Thomas %T On the Center-Valued Atiyah Conjecture for $L^2$-Betti Numbers %J Documenta mathematica %D 2017 %P 659-677 %V 22 %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_2017__22__a34/ %G en %F DOCMA_2017__22__a34