Babik, N. P., Y. I. Fedorovych, and V. V. Fedorovych. “DURATION AND EFFECTIVENESS OF LIFETIME USE OF DAIRY COWS DEPENDENDING ON THEIR FATHER’S COUNTRY ORIGIN”. Animal Breeding and Genetics, Vol. 54, Nov. 2017, pp. 19-29, doi:10.31073/abg.54.03.