Wittlich, M. [P:(DE-Juel1)VDB28257] ; Thiagarajan, P. [P:(DE-Juel1)VDB89240] ; Koenig, B. W. [P:(DE-Juel1)132009] ; Hartmann, R. [P:(DE-Juel1)VDB57647] ; Willbold, D. [P:(DE-Juel1)132029]