Khmelnychyi, L.M., and D.O. Bardash. 2019. “Indicators of Cows Longevity of Ukrainian Red-and-White Dairy Breed Depending on the Share of Holstein Breed Heredity”. Bulletin of Sumy National Agrarian University. The Series: Livestock, no. 4(39) (December), 13-19. https://doi.org/10.32845/bsnau.lvst.2019.4.2.