Offermann, D. [P:(DE-HGF)0] ; Wintel, J. [P:(DE-HGF)0] ; Kalicinsky, C. [P:(DE-Juel1)VDB96820] ; Knieling, P. [P:(DE-HGF)0] ; Koppmann, R. [P:(DE-Juel1)VDB810] ; Steinbrecht, W. [P:(DE-HGF)0]