Balster, T. [P:(DE-Juel1)VDB9873] ; Tautz, F. S. [P:(DE-Juel1)128791] ; Polyakov, V. M. [P:(DE-Juel1)VDB34072] ; Ibach, H. [P:(DE-Juel1)VDB5414] ; Sloboshanin, S. [P:(DE-Juel1)VDB34073] ; Öttking, R. [P:(DE-Juel1)VDB63917] ; Schaefer, J. A. [P:(DE-Juel1)VDB24978]