Zeldin , V., Kozyr , V., & Sokrut , O. (2020). Мonitoring of blood condition and sperm quality of breeding boars of different genotypes and efficiency of reproduction of the herd. Bulletin of Sumy National Agrarian University. The Series: Livestock, (4(43), 38-44. https://doi.org/10.32845/bsnau.lvst.2020.4.6