Li, Zhi-Yuan; Wang, Min; Bian, Qing-Hua; Zheng, Bing; Mao, Jian-You; Li, Shuo-Ning; Liu, Shang-Zhong; Wang, Ming-An; Zhong, Jiang-Chun; Guo, Hong-Chao Chemistry - A European Journal, 2011, vol. 17, # 21 p. 5782 - 5786 doi: 10.1002/chem.201100535