Choi, J.-Y. [P:(DE-Juel1)VDB92645] ; Tietz, F. [P:(DE-Juel1)129667] ; Uhlenbruck, S. [P:(DE-Juel1)129580] ; Buchkremer, H. P. [P:(DE-Juel1)129594] ; Stöver, D. [P:(DE-Juel1)129666]