Muzychenko, G. F.; Glukhovtsev, V. G.; Badovskaya, L. A.; Kozhina, N. D.; Ignatenko, A. V.; et al. Journal of Organic Chemistry USSR (English Translation)Zhurnal Organicheskoi Khimii, 19811981, vol. 1717, # 33 p. 404 - 408481 - 496