Sihver, W. [P:(DE-Juel1)VDB17596] ; Schulze, A. [P:(DE-Juel1)VDB17597] ; Wutz, W. [P:(DE-Juel1)VDB12398] ; Stüsgen, S. [P:(DE-Juel1)VDB59407] ; Olsson, R. A. [P:(DE-HGF)0] ; Bier, D. [P:(DE-Juel1)VDB2513] ; Holschbach, M. H. [P:(DE-Juel1)VDB20516]