Functional state of the udder of cows after the treatment of the udder nipples with hygiene products during milkingA.V. Filatova, Yu.V. Bibaeva, S.V. Kozlov, M.V. Nistratova and V.S. AvdeenkoBIO Web Conf., 36 (2021) 06035DOI: https://doi.org/10.1051/bioconf/20213606035