%0 Journal Article %A Anselm Knebusch %A Peter Linnell %A Thomas Schick %T On the Center-Valued Atiyah Conjecture for $L^2$-Betti Numbers %J Documenta mathematica %D 2017 %P 659-677 %V 22 %U http://geodesic.mathdoc.fr/articles/10.4171/dm/575/ %R 10.4171/dm/575 %F 10_4171_dm_575