Levichkova, M. [P:(DE-HGF)0] ; Mankov, V. [P:(DE-HGF)0] ; Starbov, N. [P:(DE-Juel1)VDB5992] ; Karashanova, D. [P:(DE-HGF)0] ; Mednikarov, B. [P:(DE-HGF)0] ; Starbova, K. [P:(DE-Juel1)VDB5995]