1. G. L. Eichhorn (ed.), Inorganic Biochemistry, Amsterdam–London–New York (1973).
2. S. N. Bolotin, N. N. Bukov, V. A. Volynkin, and V. T. Panyushkin, Coordination Chemistry of Natural Amino Acids [in Russian], LKI, Moscow (2007).
3. А. М. Т. Sanz, P. J. C. Rodriguez, and M. F. J. Garcia, Chem. Commun., 57, 1405 (1992).
4. V. T. Panyushkin, Spectroscopy of Coordination Compounds of REEs [in Russian], Rostov Univ., Rostov-on-Don (1984).
5. M. M. Shoukry, E. M. Khairy, and R. G. Khalil, Transition Met. Chem., 22, No. 5, 465 (1997).