参考文献

Shachkus, A. A.; Degutis, Yu. A.; Mikul'skis, P. P. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # 1 p. 47 - 50 Khimiya Geterotsiklicheskikh Soedinenii, 1989 , # 1 p. 57 - 59