参考文献

Krasovskii,A.N.; Kochergin,P.M. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1967 , vol. 3, p. 709 - 712 Khimiya Geterotsiklicheskikh Soedinenii, 1967 , vol. 3, p. 899 - 903