Pchelyakov, O. P. [P:(DE-HGF)0] ; Bolkhovityanov, Y. B. [P:(DE-HGF)0] ; Dvurechenskii, A. V. [P:(DE-HGF)0] ; Sokolov, A. P. [P:(DE-HGF)0] ; Nikiforov, A. I. [P:(DE-HGF)0] ; Yakimov, A. I. [P:(DE-HGF)0] ; Voigtländer, B. [P:(DE-Juel1)VDB5601]