Kaufmann, I. [P:(DE-HGF)0] ; Schulze-Till, T. [P:(DE-HGF)0] ; Schneider, H. U. [P:(DE-Juel1)129397] ; Zimmermann, U. [P:(DE-HGF)0] ; Jakob, P. [P:(DE-HGF)0] ; Wegner, L. H. [P:(DE-HGF)0]