For citations:
Khromova О.L., Abramova N.I., Selimyan M.O., Zenkova N.V. Factors affecting the duration of economic use of holstein cows. Bulletin of NSAU (Novosibirsk State Agrarian University). 2025;(2):246-253. (In Russ.) https://doi.org/10.31677/2072-6724-2025-75-2-246-253