Alder, Roger W.; Heilbronner, Edgar; Honegger, Evi; McEwen, Alan B.; Moss, Richard E.; Olefirowicz, Edward; Petillo, Peter A.; Sessions, Richard B.; Weisman, Gary R.; White, Jonathan M.; Yang, Zhong-Zhi Journal of the American Chemical Society, 1993 , vol. 115, # 15 p. 6580 - 6591