Stockert, O. [P:(DE-HGF)0] ; Haase, A. [P:(DE-HGF)0] ; Schmalzl, K. [P:(DE-Juel1)VDB56481] ; Krellner, C. [P:(DE-HGF)0] ; Mufti, N. [P:(DE-HGF)0] ; Geibel, C. [P:(DE-HGF)0]