Klare, J. P. [P:(DE-HGF)0] ; Gordeliy, V. I. [P:(DE-Juel1)VDB482] ; Labahn, J. [P:(DE-Juel1)VDB886] ; Büldt, G. [P:(DE-Juel1)131957] ; Steinhoff, H.-J. [P:(DE-HGF)0] ; Engelhard, M. [P:(DE-HGF)0]