Khalak , V., Bordun , A., Bordunova , O., Pavlenko , J. and Opara , V. (2020) “The level of phenotypic consolidation of signs of reproductive qualities of sows of different breeding value and economic efficiency of their”, Bulletin of Sumy National Agrarian University. The series: Livestock, (1 (40), pp. 87-93. doi: 10.32845/bsnau.lvst.2020.1.13.