Kovalchuk, I. V., Holenia, Y. H., Kovalchuk, I. I. and Roivskyi, O. I. (2022) “ACCELERATED SYSTEM OF CALVES BREEDING AS A FACTOR OF ENSURING THEIR DEVELOPMENT AND SECURITY”, Bulletin of Sumy National Agrarian University. The series: Livestock, (1), pp. 26-30. doi: 10.32845/bsnau.lvst.2022.1.4.