Ehlers, Christian [P:(DE-Juel1)8878] ; Klemp, Dieter [P:(DE-Juel1)16218] ; Kofahl, Claudia [P:(DE-Juel1)159102] ; Fröhlich, H. [P:(DE-HGF)0] ; Möllmann-Coers, Michael [P:(DE-Juel1)25021]