参考文献

Vainilavichyus, P. I.; Syadyaryavichyute, V. Yu. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 12 p. 1332 - 1335 Khimiya Geterotsiklicheskikh Soedinenii, 1987 , # 12 p. 1655 - 1658