Khmelnychyi , Serhii, Nikolai Povod, and Evgeniya Samokhina. “Productive Longevity of Ukrainian Black-and-White Dairy Cows Depending on the Inheritance of Holstein Sires”. Bulletin of Sumy National Agrarian University. The series: Livestock, no. 2 (41) (October 26, 2020): 81-85. Accessed April 24, 2024. https://snaubulletin.com.ua/index.php/ls/article/view/205.