Yoo, Eun Jeong; Ahlquist, Marten; Kim, Seok Hwan; Bae, Imhyuck; Fokin, Valery V.; Sharpless, K. Barry; Chang, Sukbok Angewandte Chemie - International Edition, 2007 , vol. 46, # 10 p. 1730 - 1733