Naef, H., Alhussen, M.A., Vatnikov, Y.A., Cheskidova, L.V., Semenova, V.I., Parshin, P.A. and Alsalh, M.A. 2021. Parameters of nonspecific resistance of calves with respiratory pathology before and after treatment. Journal of Advanced Veterinary and Animal Research. 8, 3 (Jul. 2021), 355–360.