Tolstikov, G. A.; Odinokov, V. N.; Miftakhov, M. S.; Galeeva, R. I.; Valeev, F. A.; et al.
Journal of Organic Chemistry USSR (English Translation), 1982 , vol. 18, p. 627 - 632
Zhurnal Organicheskoi Khimii, 1982 , vol. 18, # 4 p. 721 - 727

Tolstikov, G. A.; Miftakhov, M. S.; Valeev, F. A.
Journal of Organic Chemistry USSR (English Translation), 1981 , vol. 17, p. 2000 - 2001
Zhurnal Organicheskoi Khimii, 1981 , vol. 17, # 10 p. 2241