Tikhonova, L. G.; Serebryakova, E. S.; Maksikova, A. V.; Gareev, G. A.; Vereshchagin, L. I.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1981 , vol. 17, # 12 p. 1241 - 1244
Khimiya Geterotsiklicheskikh Soedinenii, 1981 , vol. 17, # 12 p. 1685 - 1688

Vereshchagin, L. I.; Tikhonova, L. G.; Maksikova, A. V.; Serebryakova, E. S.; Proidakov, A. G.; Filippova, T. M.
Journal of Organic Chemistry USSR (English Translation), 1980 , vol. 16, # 4 p. 641 - 648
Zhurnal Organicheskoi Khimii, 1980 , vol. 16, # 4 p. 730 - 738