Slebarski, E. C. [P:(DE-HGF)0] ; Szot, K. [P:(DE-Juel1)VDB2799] ; Gamza, M. [P:(DE-HGF)0] ; Penkalla, H.-J. [P:(DE-Juel1)VDB85249] ; Breuer, U. [P:(DE-Juel1)VDB2782]