Tamaki,T.
Bulletin of the Chemical Society of Japan, 1978 , vol. 51, # 4 p. 1145 - 1152

Bokova, A. I.; Buchina, I. K.
Journal of Organic Chemistry USSR (English Translation), 1984 , vol. 20, p. 1199 - 1201
Zhurnal Organicheskoi Khimii, 1984 , vol. 20, # 6 p. 1318 - 1321