1. Kazantseva, E. S. Circulation of heavy metals in food chains and ways to determine the ecological balance of heavy metals content / E. S. Kazantseva, M. N. Smirnov // Youth and Science. - 2019. - No. 3. - P. 2. - EDN SXJPIQ. (in Russ).
2. Analysis of toxicological safety of feed by atomic absorption spectroscopy
3. Frumin, G.T. Environmental toxicology (ecotoxicology). A course of lectures. – St. Petersburg: RSHMU Publishers, 2013. – 179 pp. (in Russ).
4. Study of the biological accumulation of heavy metals / E. I. Alekseeva, N. A. Lushnikov, T. L. Leshchuk, N. V. Shipunova // Feeding farm animals and fodder production. - 2015. - No. 1. - P. 41-47. – EDN TCUOC. (in Russ).