Zbrodko, Y. A., D. A. Yerezhepov, B. Zh. Baltabaev, A. M. Zhomartov, and A. S. Musayeva. “Dairy Productivity Genetic Potential of Holstein and Brown Breeds Sires in Kazakhstan”. International Journal of Biology and Chemistry, no. 4 (December 20, 2012): 46–51. Accessed May 2, 2024. https://ijbch.kaznu.kz/index.php/kaznu/article/view/66.