Odinokov, V. N.; Kukovinets, O. S.; Sakharova, N. I.; Tolstikov, G. A. Journal of Organic Chemistry USSR (English Translation), 1985 , vol. 21, # 6 p. 1075 - 1077 Zhurnal Organicheskoi Khimii, 1985 , vol. 21, # 6 p. 1180 - 1182