参考文献

Vlad, P. F.; Ungur, N. D.; Perutskii, V. B. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1990 , vol. 26, # 7 p. 746 - 750 Khimiya Geterotsiklicheskikh Soedinenii, 1990 , # 7 p. 896 - 901