1. Khimicheskaya entsiklopediya (Encyclopedia of Chemistry), Knunyants, I.L., Ed., Moscow: Sovetskaya Entsiklopediya, 1988, vol. 1, p. 383.
2. Rebrov, V.G. and Gromova, O.A., in Vitaminy, makro-i mikroelementy (Vitamins, Macroelements, and Microelements), Moscow: GEOTAR-Media, 2008, p. 116.
3. Luo, Y.-R., Handbook of Bond Dissociation Energies in Organic Compounds, Boca Raton, Fla. CRC, 2003.
4. Denisov, E.T., Russ. J. Phys. Chem., 1993, vol. 67, no. 12, p. 2178.
5. Denisova, T.G. and Denisov, E.T., Russ. Chem. Bull., 2008, vol. 57, no. 9, p. 1824.