Metzner, R. [P:(DE-Juel1)129360] ; Breuer, U. [P:(DE-Juel1)VDB2782] ; Kayser, S. [P:(DE-HGF)0] ; Lorenz, W. [P:(DE-HGF)0] ; Schurr, U. [P:(DE-Juel1)129402] ; Schröder, W. [P:(DE-Juel1)VDB2596]