Kovalenko, L. M., and A. I. Kovalenko. 2021. “РATHOLOGY OF THE RESPIRATORY TRACT OF PIGS UNDER INFLUENCE OF INFECTIOUS PATIENTS”. Bulletin of Sumy National Agrarian University. The Series: Veterinary Medicine, no. 3 (54) (November), 26-30. https://doi.org/10.32845/bsnau.vet.2021.3.4.