参考文献

Kelarev, V. I.; Shvekhgeimer, G. A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1980 , vol. 16, # 5 p. 501 - 506 Khimiya Geterotsiklicheskikh Soedinenii, 1980 , # 5 p. 645 - 650