Heedt, S. [P:(DE-HGF)0] ; Wehrmann, I. [P:(DE-HGF)0] ; Rieger, T. [P:(DE-HGF)0] ; Sladek, K. [P:(DE-HGF)0] ; Bürgler, D.E. [P:(DE-Juel1)130582] ; Grützmacher, D. [P:(DE-Juel1)125588] ; Schäpers, T. [P:(DE-HGF)0]