Goncharenko, M. P.; Sharanin, Yu. A.; Shestopalov, A. M., Journal of Organic Chemistry USSR (English Translation), 1990, vol. 26, # 7.2, p. 1362 - 1370
Sharanin, Yu. A.; Goncharenko, M. P.; Shestopalov, A. M., Journal of Organic Chemistry USSR (English Translation), 1991, vol. 27, # 9.2, p. 1767 - 1778