Shostakovskii,M.F. et al.
Zhurnal Organicheskoi Khimii, 1966 , vol. 2, p. 209 - 212,199 - 202

Golovnya, R. V.; Misharina, T. A.; Garbuzov, V. G.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1980 , vol. 29, p. 1765 - 1769
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1980 , # 11 p. 2503 - 2508