Erman, M. B.; Golovacheva, E. V.; Gulyi, S. E.; Zasetskii, D. L.; Shutikova, L. A.; et al.
Journal of Organic Chemistry USSR (English Translation), 1990 , vol. 26, # 2.1 p. 219 - 221
Zhurnal Organicheskoi Khimii, 1990 , vol. 26, # 2 p. 262 - 265

Patwardhan,S.A.; Gupta,A.S.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1979 , vol. 17, p. 76 - 78

Gavrilyuk, O. A.; Korchagina, D. V.; Osadchii, S. A.; Barkhash, V. A.
Journal of Organic Chemistry USSR (English Translation), 1988 , vol. 24, p. 871 - 885
Zhurnal Organicheskoi Khimii, 1988 , vol. 24, # 5 p. 966 - 982