Drozd, V. N.; Udachin, Yu. M.; Bogomolova, G. S.; Sergeichuk, V. V.
Journal of Organic Chemistry USSR (English Translation), 1980 , vol. 16, p. 775 - 778
Zhurnal Organicheskoi Khimii, 1980 , vol. 16, # 4 p. 883 - 886