Littke, R. [P:(DE-HGF)0] ; Cramer, B. [P:(DE-HGF)0] ; Gerling, P. [P:(DE-HGF)0] ; Lopatin, N. V. [P:(DE-HGF)0] ; Poelchau, A. J. [P:(DE-Juel1)VDB1266] ; Schaefer, R. G. [P:(DE-Juel1)VDB1393] ; Welte, H. D. [P:(DE-Juel1)VDB4423]