Willsch, H. [P:(DE-Juel1)VDB41706] ; Clegg, H. [P:(DE-Juel1)VDB40598] ; Horsfield, B. [P:(DE-HGF)0] ; Radke, M. [P:(DE-Juel1)VDB1306] ; Wilkes, H. [P:(DE-Juel1)VDB1781]