Khmelnychyi , S., Martynova , Y., Mykytiuk , P., Kryvchenko , T., Miadelets , V., & Naumenko , M. (2021). Longevity of dairy cows depending on breeding methods. Bulletin of Sumy National Agrarian University. The Series: Livestock, (1(44), 103-109. https://doi.org/10.32845/bsnau.lvst.2021.1.15