Zhuk, R. A.; Ludzisha, A. S.; Kostyanovskii, R. G.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 1 p. 74 - 77
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , vol. 23, # 1 p. 90 - 93

Zhuk, R. A.; Ludzisha, A. S.; Kostyanovskii, R. G.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1987 , vol. 23, # 1 p. 74 - 77
Khimiya Geterotsiklicheskikh Soedinenii, 1987 , vol. 23, # 1 p. 90 - 93