Aliev, I. A.; Korostova, S. E.; Mikhaleva, A. I.; Shevchenko, S. G.; Zeinalova, S. N.; et al. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1991 , vol. 27, # 10 p. 1055 - 1058 Khimiya Geterotsiklicheskikh Soedinenii, 1991 , vol. 27, # 10 p. 1320 - 1323