McFadden, Jill M; Frehywot, Gojeb L; Townsend, Craig A
Organic letters, 2002 , vol. 4, # 22 p. 3859 - 3862

Hof, Robert P.; Kellogg, Richard M.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1995 , # 10 p. 1247 - 1250