Friedl-Vallon, F. [P:(DE-HGF)0] ; Riese, M. [P:(DE-Juel1)129145] ; Preusse, P. [P:(DE-Juel1)VDB12001] ; Oelhaf, H. [P:(DE-HGF)0] ; Fischer, H. [P:(DE-HGF)0]