Khmelnychyi, L., and L. Bondarchuk. “Variability of Linear Conformation Traits of the First-Calf Cows of Sumy Intrabreed Type of the Ukrainian Black-and-White Dairy Breed by Different Variants of Selection of Genealogical Formations.”. Bulletin of Sumy National Agrarian University. The Series: Livestock, no. 4(39), Dec. 2019, pp. 3-12, doi:10.32845/bsnau.lvst.2019.4.1.