参考文献

Polivin, Yu. N.; Trofimova, M. V.; Karakhanov, R. A.; Ageev, E. A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1992 , vol. 28, # 5 p. 494 - 496 Khimiya Geterotsiklicheskikh Soedinenii, Sbornik, 1992 , # 5 p. 592 - 594