Kirdyanov, A.V. [P:(DE-HGF)0] ; Treydte, K. S. [P:(DE-HGF)0] ; Nikolaev, A. [P:(DE-HGF)0] ; Helle, G. [P:(DE-Juel1)VDB3527] ; Schleser, G. H. [P:(DE-HGF)0]