参考文献

Tirzit, G. D.; Skrastin'sh, I. P.; Dubur, G. Ya. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 1 p. 55 - 56 Khimiya Geterotsiklicheskikh Soedinenii, 1987 , vol. 23, # 1 p. 68 - 69