Fedorovych , Y., Fedorovych , V., Mazur , N., Bodnar , P., & Fil , F. (2019). Reproductive ability of cows and their descendants of different generations. Bulletin of Sumy National Agrarian University. The Series: Livestock, (4(39), 20-27. https://doi.org/10.32845/bsnau.lvst.2019.4.3