Ladyzhnikova, T. D.; Altukhov, K. V.; Solov'ev, N. A. Journal of Organic Chemistry USSR (English Translation), 1986 , vol. 22, # 12 p. 2349 - 2350 Zhurnal Organicheskoi Khimii, 1986 , vol. 22, # 12 p. 2618 - 2619