Jayachandran, J. Paul; Wang, Maw-Ling
Synthetic Communications, 1999 , vol. 29, # 23 p. 4101 - 4112

Keating, Amy E.; Merrigan, Steven R.; Singleton, Daniel A.; Houk
Journal of the American Chemical Society, 1999 , vol. 121, # 16 p. 3933 - 3938

Slobodin,Ya.M.; Egenburg,I.Z.
Journal of Organic Chemistry USSR (English Translation), 1970 , vol. 6, p. 2638
Zhurnal Organicheskoi Khimii, 1970 , vol. 6, p. 2629