1. Chumakov, Yu.I., Piridinovye osnovaniya (Pyridine Bases), Kiev: Tekhnika, 1965, p. 164.
2. Artamonov, A.A., Rozenberg, B.A., and Sheinkman, A.K., Reaktsii i metody issledovaniya organicheskkh soedinenii (Reactions and Methods of Investigation of Organic Compounds), Kazanskii, B.A., Knunyants, I.L., Shemyakin, M.M., and Mel’nikov, N.N., Eds., Moscow: Khimiya, 1964vol. 14, p. 173.
3. Kukharev, B.F., Stankevich, V.K., and Klimenko, G.R., Usp. Khim., 1995, vol. 64, p. 562.
4. Trofimov, B.A., Nikol’skaya, A.N., Gusarova, N.K., Kazimirovskaya, V.B., Amosova, S.V., Belogorlova, N.A., Chernyshova, N.A., Levina, M.N., Shelkova, T.V., Gendin, D.V., and Voronkov, M.G., Khim.-Farm. Zh., 1987, vol. 21, p. 26.
5. Minbaev, B.U., Shostakovskii, M.F., and Kagarlitskii, A.D., Khim. Geterotsikl. Soedin., 1983, p. 1199.