Fischer, S. [P:(DE-HGF)0] ; Frommer, A. [P:(DE-HGF)0] ; Glässner, U. [P:(DE-HGF)0] ; Lippert, Th. [P:(DE-Juel1)132179] ; Ritzenhöfer, G. [P:(DE-HGF)0] ; Schilling, K. [P:(DE-HGF)0]