Iken, H. [P:(DE-Juel1)161164] ; Ahlborn, K. [P:(DE-HGF)0] ; Gerlach, F. [P:(DE-HGF)0] ; Vonau, W. [P:(DE-HGF)0] ; Zander, W. [P:(DE-Juel1)128648] ; Schubert, J. [P:(DE-Juel1)128631] ; Schöning, M. J. [P:(DE-Juel1)128727]