Feygenson, M. [P:(DE-HGF)0] ; Schweika, W. [P:(DE-Juel1)130963] ; Ioffe, A. [P:(DE-Juel1)130729] ; Vakhrushev, S. B. [P:(DE-HGF)0] ; Brückel, T. [P:(DE-Juel1)130572]