Gevorkyan, A. A.; Kazaryan, P. I.; Avakyan, S. V.
Journal of Organic Chemistry USSR (English Translation), 1988 , vol. 24, # 6 p. 1207 - 1208
Zhurnal Organicheskoi Khimii, 1988 , vol. 24, # 6 p. 1340 - 1341