参考文献

Gall', A. A.; Shishkin, G. V. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , vol. 19, # 5 p. 549 - 553 Khimiya Geterotsiklicheskikh Soedinenii, 1983 , vol. 19, # 5 p. 677 - 681