参考文献

Yutilov, Yu. M.; Svertilova I. A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1986 , vol. 22, # 1 p. 80 - 85 Khimiya Geterotsiklicheskikh Soedinenii, 1986 , vol. 22, # 1 p. 97 - 102