Zon, G., L. Ivanovska, and I. Zon. 2019. “Infectious Hepatitis in Dogs (state of the Problem)”. Bulletin of Sumy National Agrarian University. The Series: Veterinary Medicine, no. 4 (47) (December), 16-21. https://doi.org/10.32845/bsnau.vet.2019.4.3.