Cao, X. Q. [P:(DE-Juel1)VDB216] ; Vaßen, R. [P:(DE-Juel1)129670] ; Jungen, W. [P:(DE-Juel1)VDB710] ; Schwartz, S. [P:(DE-HGF)0] ; Tietz, F. [P:(DE-Juel1)129667] ; Stöver, D. [P:(DE-Juel1)129666]