Eickermann, T. [P:(DE-Juel1)132091] ; Frings, W. [P:(DE-Juel1)132108] ; Wäldrich, O. [P:(DE-HGF)0] ; Wieder, P. [P:(DE-Juel1)VDB4062] ; Ziegler, W. [P:(DE-HGF)0]