Volk, C. M. [P:(DE-HGF)0] ; Wetter, T. [P:(DE-HGF)0] ; Ivanova, E. [P:(DE-HGF)0] ; Wollny, A. [P:(DE-HGF)0] ; Schmidt, U. [P:(DE-HGF)0] ; Konopka, Paul [P:(DE-Juel1)129130] ; Toon, G. [P:(DE-HGF)0]