Kovalenko, Lidiia, and Alexander Kovalenko. “Pathomorphological Changes in the Body of Calves in Protozoosis, Prevention Measures”. Bulletin of Sumy National Agrarian University. The series: Veterinary Medicine, no. 4 (51) (December 28, 2020): 11-18. Accessed April 12, 2025. https://snaubulletin.com.ua/index.php/vm/article/view/282.