Khmelnychyi, L. M., and Y. M. Pavlenko. “GENETIC MARKERS IN THE BREEDING AND PRESERVATION OF THE GENE POOL OF BROWN CATTLE IN THE SUMY REGION”. Bulletin of Sumy National Agrarian University. The Series: Livestock, no. 3 (46), Oct. 2021, pp. 3-6, doi:10.32845/bsnau.lvst.2021.3.1.