Bertschinger, G. [P:(DE-Juel1)129965] ; Ahmad, I. [P:(DE-Juel1)VDB3262] ; Biel, W. [P:(DE-Juel1)VDB3261] ; Bitter, M. [P:(DE-HGF)0] ; Weinheimer, J. [P:(DE-HGF)0] ; Kunze, H. J. [P:(DE-HGF)0]