参考文献

Kalcheva, V. B.; Tsvetanska, L. I. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1981 , vol. 17, # 8 p. 756 - 758 Khimiya Geterotsiklicheskikh Soedinenii, 1981 , # 8 p. 1028 - 1030