Zefirov, N. S.; Kuznetsova, T. S.; Kozhushkov, S. I. Journal of Organic Chemistry USSR (English Translation), 1983 , vol. 19, # 8 p. 1412 - 1415 Zhurnal Organicheskoi Khimii, 1983 , vol. 19, # 8 p. 1599 - 1602