参考文献

Shachkus, A. A.; Degutis, Yu. A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1988 , vol. 24, p. 41 - 44 Khimiya Geterotsiklicheskikh Soedinenii, 1988 , vol. 24, # 1 p. 49 - 53