2. Pratt J. M. Inorganic Chemistry of Vitamin B12. New York: Academic Press Inc, 1972. 347 p.
12. Zhou K., Zelder F. Eur. J. Inorg. Chem. 2011, 2011, 53-57.
17. Brenner M., Mahon S. B., Lee J., Kim J., Mukai D., Goodman S., Kreuter K. A., Ahdout R., Mohammad O., Sharma V. S., Blackledge W., Boss G. R. J. Biomed. Opt. 2010, 15(1), 017001.
http://dx.doi.org/10.1117/1.3290816