Kopperberg, N. [P:(DE-HGF)0] ; Wiefels, Stefan [P:(DE-Juel1)187229] ; Liberda, Sergej [P:(DE-Juel1)186768] ; Waser, R. [P:(DE-Juel1)131022] ; Menzel, Stephan [P:(DE-Juel1)158062]