Belezheva, V. S.; Mel'man, A. I.; Pol'shakov, V. I.; Anisimova, O. S.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1992 , vol. 28, # 2 p. 234 - 235
Khimiya Geterotsiklicheskikh Soedinenii, 1992 , # 2 p. 279 - 280

Velzheva, V. S.; Nevskii, K. V.; Suvorov, N. N.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1985 , vol. 21, # 2 p. 191 - 196
Khimiya Geterotsiklicheskikh Soedinenii, 1985 , vol. 21, # 2 p. 230 - 235

Velezheva, V. S.; Dvorkin, V. V.; Suvorov, N. N.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1985 , vol. 21, # 2 p. 234
Khimiya Geterotsiklicheskikh Soedinenii, 1985 , vol. 21, # 2 p. 275 - 276