参考文献
Shorshnev, S. V.; Esipov, S. E.; Chernyshev, A. I.; Pozharskii, A. F.; Kuz'menko, V. V.; Gulevskaya, A. V.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1990 , vol. 26, # 2 p. 191 - 200
Khimiya Geterotsiklicheskikh Soedinenii, 1990 , vol. 26, # 2 p. 224 - 233
