KHALAK , V.; BORDUN , A.; BORDUNOVA , O.; PAVLENKO , J.; OPARA , V. 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, n. 1 (40), p. 87-93, 24 Feb. 2020.