Gavrilyuk, O. A.; Korchagina, D. V.; Tatarova, L. E.; Burdin, E. A.; Bagryanskaya, I. Yu.; et al. Journal of Organic Chemistry USSR (English Translation), 1987 , vol. 23, # 8 p. 1540 - 1550 Zhurnal Organicheskoi Khimii, 1987 , vol. 23, # 8 p. 1723 - 1735