Schneider, A. [P:(DE-HGF)0] ; Schmidt, H. [P:(DE-Juel1)156232] ; Meven, M. [P:(DE-Juel1)164297] ; Brendler, E. [P:(DE-HGF)0] ; Kirchner, J. [P:(DE-HGF)0] ; Martin, G. [P:(DE-HGF)0] ; Bertau, M. [P:(DE-HGF)0] ; Voigt, W. [P:(DE-HGF)0]