Dirks, C. [P:(DE-HGF)0] ; Scholten, B. [P:(DE-Juel1)131846] ; Happel, S. [P:(DE-HGF)0] ; Zulauf, A. [P:(DE-HGF)0] ; Bombard, A. [P:(DE-HGF)0] ; Jungclas, H. [P:(DE-HGF)0]