Orth, B. [P:(DE-Juel1)132215] ; Eicker, N. [P:(DE-Juel1)132090] ; Lippert, Th. [P:(DE-Juel1)132179] ; Schilling, K. [P:(DE-HGF)0] ; Schroers, W. [P:(DE-HGF)0] ; Sroczynski, Z. [P:(DE-HGF)0]