Razanova, O. P., Shulha, Y. I. and Saliuk, O. O. (2022) “PRODUCTIVITY OF BEE FAMILIES IN THE PERIOD OF PREPARATION FOR THE MAIN MEDICATION UNDER THE INFLUENCE OF A PROBIOTIC”, Bulletin of Sumy National Agrarian University. The series: Livestock, (2), pp. 61-67. doi: 10.32845/bsnau.lvst.2022.2.9.