Mangold, A. [P:(DE-Juel1)VDB13551] ; Grooß, J.-U. [P:(DE-Juel1)129122] ; De Backer, H. [P:(DE-HGF)0] ; Kirner, O. [P:(DE-HGF)0] ; Ruhnke, R. [P:(DE-HGF)0] ; Müller, R. [P:(DE-HGF)0]