Bick, D. S. [P:(DE-HGF)0] ; Griesche, J. D. [P:(DE-HGF)0] ; Schneller, T. [P:(DE-HGF)0] ; Staikov, G. [P:(DE-Juel1)130982] ; Waser, R. [P:(DE-Juel1)131022] ; Valov, I. [P:(DE-Juel1)131014]