von Polier, G. G. [P:(DE-HGF)0] ; Biskup, C. S. [P:(DE-HGF)0] ; Kötting, W. F. [P:(DE-HGF)0] ; Bubenzer, S. [P:(DE-Juel1)145464] ; Helmbold, K. [P:(DE-HGF)0] ; Eisert, A. [P:(DE-HGF)0] ; Gaber, T. J. [P:(DE-HGF)0] ; Zepf, F. D. [P:(DE-HGF)0]