Weiergräber, O. H. [P:(DE-Juel1)131988] ; Senin, I. I. [P:(DE-HGF)0] ; Philippov, P. P. [P:(DE-HGF)0] ; Granzin, J. [P:(DE-Juel1)131965] ; Koch, K.-W. [P:(DE-Juel1)VDB789]