Yang, Chi; Fu, Li-Min; Wang, Yuan; Zhang, Jian-Ping; Wong, Wing-Tak; Ai, Xi-Cheng; Qiao, Yi-Fang; Zou, Bing-Suo; Gui, Lin-Lin Angewandte Chemie - International Edition, 2004 , vol. 43, # 38 p. 5010 - 5013