li, dan [P:(DE-Juel1)173997] ; Vogel, Bärbel [P:(DE-Juel1)129164] ; Bian, J. [P:(DE-HGF)0] ; Müller, Rolf [P:(DE-Juel1)129138] ; Pan, L. L. [P:(DE-HGF)0] ; Günther, Gebhard [P:(DE-Juel1)129123] ; Bai, Z. [P:(DE-HGF)0] ; Li, Q. [P:(DE-HGF)0] ; Zhang, J. [P:(DE-HGF)0] ; Fan, Q. [P:(DE-HGF)0] ; Vömel, H. [P:(DE-HGF)0]