@article{smagulov_abugaliev_nassambayev_bozymov_imankulov_davletova_2026,  title={Effect of colostrum immunoglobulin concentration on early growth performance in dairy heifers},  volume={86},  ISSN={1519-6984},  url={https://doi.org/10.1590/1519-6984.301661},  DOI={10.1590/1519-6984.301661},  journal={Brazilian Journal of Biology},  publisher={Instituto Internacional de Ecologia},  author={Smagulov, D. and Abugaliev, S. and Nassambayev, Y. and Bozymov, K. and Imankulov, B. and Davletova, A.},  year={2026},  pages={e301661} }