Broeder, Jens [P:(DE-HGF)0] ; Helfer, Nicola [P:(DE-Juel1)171301] ; Wortmann, Daniel [P:(DE-Juel1)131042] ; Koslowski, Hans Rudolf [P:(DE-Juel1)130066] ; Linsmeier, Christian [P:(DE-Juel1)157640] ; Bluegel, S. [P:(DE-HGF)0]