Bietenholz, Wolfgang [P:(DE-HGF)0] ; Eicker, Norbert [P:(DE-Juel1)132090] ; Frommer, Andreas [P:(DE-HGF)0] ; Lippert, Thomas [P:(DE-Juel1)132179] ; Medeke, Björn [P:(DE-HGF)0] ; Schilling, Klaus [P:(DE-HGF)0]