Yaremchuk , O. «EFFICIENCY OF PORK PRODUCTION AT DIFFERENT PERIODS OF PIGS REARING AND THEIR RESISTANCE ». EurasianUnionScientists, т. 3, вып. 12(81), январь 2021 г., сс. 12-18, doi:10.31618/ESU.2413-9335.2020.3.81.1156.