Drozdova, O. A.; Astrat'ev, A. A.; Kuznetsov, L. L.; Selivanov, V. F. Journal of Organic Chemistry USSR (English Translation), 1983 , vol. 19, # 4 p. 671 - 675 Zhurnal Organicheskoi Khimii, 1983 , vol. 19, # 4 p. 761 - 766