Ladyka, V.I., L.M. Khmelnychyi, M.B. Shpetnyi, and V.V. Vechorka. 2019. “Productivity of Piglets on Rearing With Large-Group Confinement on Polymer and Concrete Floor”. Bulletin of Sumy National Agrarian University. The Series: Livestock, no. 1-2(36-37) (July), 3-14. https://doi.org/10.32845/bsnau.lvst.2019.1-2.1.