For citations:
Chupurina E.G., Iurin D.A., Vlasov A.B., Iurina N.A. Effectiveness of a feed additive with a high degree of protein protection in feeding fresh cows. Bulletin of NSAU (Novosibirsk State Agrarian University). 2021;(1):134-141. (In Russ.) https://doi.org/10.31677/2072-6724-2021-58-1-134-141