1. D. V. Korol’kov, Unexpected Logic of Bioneorganic Chemistry. Traditional and Paradoxical Chemistry [in Russian], R.V. Bogdanov, Ed., Izd. Leningr. Univ., Leningrad (1985).
2. S. N. Bolotin, N. N. Bukov, V. A. Volynkin, and V. T. Panyushkin, Coordination Chemistry of Natural Amino Acids [in Russian], Izd. LKI, Moscow (2008).
3. A. V. Kudrin, A. V. Skal’nyi, A. A. Zhavoronkov, et al., Immunofarmacology of Microelements [in Russian], Izd. KMK, Moscow (2000).
4. Yu. A. Buslaev and R. L. Davidovich, Koordinats. Khim., 15, No. 11, 1444–1465 (1989).
5. T. N. Sumarokova, R. A. Kuidina, and L. V. Levchenko, Zh. Obshch. Khim., 39, No. 9, 2037–2042 (1969).