Shkurko, O. P.; Gogin, L. L.; Mamaev, V. P.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1982 , vol. 18, # 3 p. 310 - 313
Khimiya Geterotsiklicheskikh Soedinenii, 1982 , vol. 18, # 3 p. 410 - 414
Gromov, S. P.; Yashunskii, D. V.; Sagitullin, R. S.; Bundel, Yu. G.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1992 , vol. 28, # 9 p. 1054 - 1059
Khimiya Geterotsiklicheskikh Soedinenii, 1992 , # 9 p. 1243 - 1249