Li, C. [P:(DE-Juel1)VDB63965] ; Pobelov, I. [P:(DE-Juel1)VDB45469] ; Wandlowski, Th. [P:(DE-Juel1)VDB9859] ; Bagrets, A. [P:(DE-HGF)0] ; Arnold, A. [P:(DE-HGF)0] ; Evers, F. [P:(DE-HGF)0]