Rajasekaran, B. [P:(DE-Juel1)VDB90947] ; Mauer, G. [P:(DE-Juel1)129633] ; Vaßen, R. [P:(DE-Juel1)129670] ; Röttger, A. [P:(DE-HGF)0] ; Weber, S. [P:(DE-HGF)0] ; Theisen, W. [P:(DE-HGF)0]