Heidelberg, A. [P:(DE-HGF)0] ; Rozenkranz, C. [P:(DE-HGF)0] ; Schultze, J. W. [P:(DE-HGF)0] ; Schäpers, T. [P:(DE-Juel1)128634] ; Staikov, G. [P:(DE-Juel1)VDB13645]