Sirotkina, E. E.; Moskalev, N. V.; Shabotkin I. G.; Ogorodnikov, V. D.; Khayut, E. B.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1985 , vol. 21, # 4 p. 438 - 442
Khimiya Geterotsiklicheskikh Soedinenii, 1985 , vol. 21, # 4 p. 525 - 529

Moskalev, N. N.; Sirotkina, E. E.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 3 p. 275 - 281
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , vol. 23, # 3 p. 329 - 336