Berns, A. E. [P:(DE-Juel1)129438] ; Bertmer, M. [P:(DE-HGF)0] ; Schäffer, A. [P:(DE-HGF)0] ; Meier, R. J. [P:(DE-Juel1)VDB9206] ; Vereecken, H. [P:(DE-Juel1)129549] ; Lewandowski, H. [P:(DE-Juel1)129496]