Trifonova, V. N.; Zorin, V. V.; Zlot-skii, S. S.; Rakhmankulov, D. L. Journal of Organic Chemistry USSR (English Translation), 1983 , vol. 19, p. 764 - 767 Zhurnal Organicheskoi Khimii, 1983 , vol. 19, # 4 p. 864 - 867