Behn, H. [P:(DE-Juel1)VDB74001] ; Tittmann, S. [P:(DE-Juel1)VDB74003] ; Walter, A. [P:(DE-Juel1)VDB2595] ; Schurr, U. [P:(DE-Juel1)129402] ; Noga, G. [P:(DE-HGF)0] ; Ulbrich, A. [P:(DE-Juel1)VDB63395]