Knyazev, V. N.; Drozd, V. N.; Mozhaeva, T. Ya.
Journal of Organic Chemistry USSR (English Translation), 1981 , vol. 17, # 11 p. 2124 - 2130
Zhurnal Organicheskoi Khimii, 1981 , vol. 17, # 11 p. 2376 - 2383