Liu, Dan
Hu, Kai
Herrmann, Sebastian
Cikes, Maja
Ertl, Georg
Weidemann, Frank
Störk, Stefan
Nordbeck, Peter
Funding for this research was provided by:
the Bundesministerium für Bildung und Forschung of the Federal Republic of Germany (BMBF 01EO1004 and 01EO1504)