Gareev, G.A.; Nikitin, V.M.; Shafeev, M.A.; Kirillova, L.K.; Kirillova, L.P.; Vereshchagin, L.I. Journal of Organic Chemistry USSR (English Translation), 1991 , vol. 27, # 11.1 p. 2002 - 2009 Zhurnal Organicheskoi Khimii, 1991 , vol. 27, # 11 p. 2261 - 2269