Ibatullin, U. G.; Mukhametova, D. Ya.; Makaeva, R. M.; Safarov, M. G.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1985 , vol. 21, # 4 p. 381 - 382
Khimiya Geterotsiklicheskikh Soedinenii, 1985 , vol. 21, # 4 p. 461 - 462