Witthuhn, B. [P:(DE-HGF)0] ; Klauth, P. [P:(DE-Juel1)VDB764] ; Klumpp, E. [P:(DE-Juel1)129484] ; Narres, H.-D. [P:(DE-Juel1)VDB1124] ; Martinius, H. [P:(DE-HGF)0]