Surzhykov, A. [P:(DE-Ds200)BUDP1-0314] ; Fritzsche, S. [P:(DE-Ds200)OR2243] ; Shabaev, V. M. [P:(DE-HGF)0] ; Stöhlker, T. [P:(DE-Ds200)OR1264] ; Maiorova, A. V. [P:(DE-HGF)0]