Tytukh, Yaroslav. “Performance Monitoring Includes Various Forms of Mastitis in Sumy Region Farms”. Bulletin of Sumy National Agrarian University. The series: Veterinary Medicine, no. 1 (52) (March 31, 2021): 45-50. Accessed May 19, 2022. https://snaubulletin.com.ua/index.php/vm/article/view/410.