参考文献

Shul'ga, A. M.; Ponomarev, G. V. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1984 , vol. 20, # 7 p. 748 - 753 Khimiya Geterotsiklicheskikh Soedinenii, 1984 , vol. 20, # 7 p. 922 - 927