Yashchuk, I. V., and I. M. Savchuk. “THE INFLUENCE OF PROTEIN NUTRITION OF BULLS ON THE ACCUMULATION OF HEAVY METALS IN MUSCLE TISSUE AND LIVER”. Bulletin of Sumy National Agrarian University. The Series: Livestock, no. 4 (47), Jan. 2022, pp. 179-85, doi:10.32845/bsnau.lvst.2021.4.31.