Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 20, # 8 p. 901 - 905
Khimiya Geterotsiklicheskikh Soedinenii, , # 8 p. 1105 - 1109

Sycheva, T.V.; Kuleshova, E.F.; Yakhontov, L.N.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1984 , vol. 20, # 8 p. 901 - 905
Khimiya Geterotsiklicheskikh Soedinenii, 1984 , # 8 p. 1105 - 1109