Kovalchuk, I. V., Y. H. Holenia, I. I. Kovalchuk, and O. I. Roivskyi. “ACCELERATED SYSTEM OF CALVES BREEDING AS A FACTOR OF ENSURING THEIR DEVELOPMENT AND SECURITY”. Bulletin of Sumy National Agrarian University. The Series: Livestock, no. 1, July 2022, pp. 26-30, doi:10.32845/bsnau.lvst.2022.1.4.