Kubicek, J. [P:(DE-HGF)0] ; Schlesinger, R. [P:(DE-HGF)0] ; Baeken, C. [P:(DE-Juel1)VDB59848] ; Büldt, G. [P:(DE-Juel1)131957] ; Schäfer, F. [P:(DE-HGF)0] ; Labahn, J. [P:(DE-Juel1)VDB886]