Zaets, A. P., Zh. Stoliar, M. Mandrik, and O. Bihas. “Stock Supply With High-Producing First-Calf Cows As an Important Reserve for Raising Milk Productivity of the Herd”. Feeds and Feed Production, no. 84 (December 26, 2017): 202-206. Accessed April 13, 2021. https://fri-journal.com/index.php/journal/article/view/203.