Goncharenko, S. B.; Kaganskii, M.M.; Portnov, Yu. N.; Granik, V. G.
Pharmaceutical Chemistry Journal, 1992 , vol. 26, # 9-10 p. 769 - 772
Khimiko-Farmatsevticheskii Zhurnal, 1992 , vol. 26, # 9-10 p. 83 - 85

Upadysheva, A. V.; Grigor'eva, N. D.; Ryabokobylko, Yu. S.; Znamenskaya, A. P.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , p. 95 - 99
Khimiya Geterotsiklicheskikh Soedinenii, 1983 , vol. 19, # 1 p. 107 - 111