Roschek, T. [P:(DE-Juel1)VDB5948] ; Müller, J. [P:(DE-Juel1)VDB2892] ; Wieder, S. [P:(DE-HGF)0] ; Rech, B. [P:(DE-Juel1)VDB5941] ; Wagner, H. [P:(DE-Juel1)VDB5911]