Verbelchuk , T., Pyaskivskiy , V., Verbelchuk , S., & Havrylovskyi , V. (2021). Rationalizality for the use of forest harvesting in the formation of bees immunity. Bulletin of Sumy National Agrarian University. The Series: Livestock, (2 (45), 68-76. https://doi.org/10.32845/bsnau.lvst.2021.2.10