M. Zubkova, V. et al. 2018. The Involvement of Heavy Metals in the Main Trophic Chains in Agrophytocenoses of the Sterlitamak Region of the Republic of Bashkortostan. International Journal of Engineering & Technology. 7, 4.38 (Dec. 2018), 755–759. DOI:https://doi.org/10.14419/ijet.v7i4.38.27538.