Block, H. [P:(DE-HGF)0] ; Maertens, B. [P:(DE-HGF)0] ; Spriestersbach, A. [P:(DE-HGF)0] ; Brinker, N. [P:(DE-HGF)0] ; Kubicek, J. [P:(DE-HGF)0] ; Fabis, R. [P:(DE-HGF)0] ; Labahn, J. [P:(DE-Juel1)VDB886] ; Schäfer, F. [P:(DE-HGF)0]