Kochuk-Yashchenko , O., D. Kucher, V. Lobodzinskyi, and V. Holiak. “Economic Useful Features of Simental Breed Cows of Different Linears in Conditions of Organic Production”. Bulletin of Sumy National Agrarian University. The Series: Livestock, no. 2 (45), May 2021, pp. 88-95, doi:10.32845/bsnau.lvst.2021.2.13.