For citations:
Gnezdilova L.A., Rozinsky S.M., Kruglova Yu.S., Muradyan Zh.Yu. The effect of the adaptogen betulin on the level of immunoglobulins in the blood serum of breeding calves and dairy cows. Agrarian science. 2025;(12):50-58. (In Russ.) https://doi.org/10.32634/0869-8155-2025-401-12-50-58
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