Ern, M. [P:(DE-Juel1)VDB13497] ; Offermann, D. [P:(DE-HGF)0] ; Preusse, P. [P:(DE-Juel1)VDB12001] ; Grossmann, K. U. [P:(DE-HGF)0] ; Oberheide, J. [P:(DE-HGF)0]