Khmelnychyi Leontiі, and Bogdan Karpenko. “Lifetime of Cows of Ukrainian Black-and-White Dairy and Holstein Breeds, Depending on the Level of Assessment of Descriptive Traits Characterizing the Body Development in the General System of Linear Classification of the Conformation Type”. Bulletin of Sumy National Agrarian University. The series: Livestock, no. 1(44) (March 29, 2021): 11-22. Accessed July 31, 2021. https://snaubulletin.com.ua/index.php/ls/article/view/290.