参考文献

Krasovskii,A.N.; Kochergin,P.M. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1969 , vol. 5, p. 243 - 245 Khimiya Geterotsiklicheskikh Soedinenii, 1969 , vol. 5, # 2 p. 321 - 324