Chekan, A., and S. Khilko. 2019. “Comparative Characteristics of Different Methods of Prevention and Treatment of Post-Medical Diseases in Cows”. Bulletin of Sumy National Agrarian University. The Series: Veterinary Medicine, no. 4 (47) (December), 35-42. https://doi.org/10.32845/bsnau.vet.2019.4.6.