Changes in calf productivity and resistance as a result of using the lactulose-based feed additiveYulia A. Voevodina, Tatyana V. Novikova, Vladimir B. Shevchuk, Anna I. Gnezdilova, Evgenia A. Fialkova, Yulia V. Vinogradova and Andrey A. KuzinBIO Web Conf., 17 (2020) 00170DOI: https://doi.org/10.1051/bioconf/20201700170