参考文献

Sheinkman, A. K.; Kozak, I. Yu.; Zemskii, B. P. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , vol. 19, # 7 p. 768 - 772 Khimiya Geterotsiklicheskikh Soedinenii, 1983 , vol. 19, # 7 p. 955 - 960