Kunkel, R. [P:(DE-Juel1)VDB4996] ; Eisele, M. [P:(DE-HGF)0] ; Schäfer, W. [P:(DE-HGF)0] ; Tetzlaff, B. [P:(DE-Juel1)129578] ; Wendland, F. [P:(DE-Juel1)VDB4997]