For citations:
Abilov A.I., Kozmenkov P.L., Iolchiev B.S., Ustimenko A.V. Qualitative characteristics of frozen-thawed semen (normal and sexed) from sires of the Holstein black-and-white breed and the age of puberty of the heifers born from them. IZVESTIYA OF TIMIRYAZEV AGRICULTURAL ACADEMY. 2023;1(4):95-109. (In Russ.) https://doi.org/10.26897/0021-342X-2023-4-95-109
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