Kügeler, C. [P:(DE-Juel1)VDB15125] ; Weng, R. [P:(DE-Juel1)VDB75716] ; Schroeder, H. [P:(DE-Juel1)VDB3130] ; Symanczyk, R. [P:(DE-HGF)0] ; Majewski, P. [P:(DE-HGF)0] ; Ufert, K.-D. [P:(DE-HGF)0] ; Waser, R. [P:(DE-Juel1)131022]