参考文献

Samsoniya, Sh. A.; Esakiya, N. A.; Suvorov, N. N. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1991 , vol. 27, # 4 p. 366 - 369 Khimiya Geterotsiklicheskikh Soedinenii, 1991 , # 4 p. 464 - 467