Liebich, J. [P:(DE-Juel1)VDB940] ; Schloter, M. [P:(DE-HGF)0] ; Schäffer, A. [P:(DE-HGF)0] ; Vereecken, H. [P:(DE-Juel1)129549] ; Burauel, P. [P:(DE-Juel1)VDB202]