参考文献

Belen'kaya, R. S.; Zimichev, A. V.; Yukova, O. P. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # 1 p. 96 - 97 Khimiya Geterotsiklicheskikh Soedinenii, 1989 , # 1 p. 112 - 113