Orlova, T. and Khaustov, V. 2019. Efficacy of Probiotic Preparation Based on Propionic Acid Bacteria in the Diets of Broiler Chickens. KnE Life Sciences. 4, 14 (Nov. 2019), 682–690. DOI:https://doi.org/10.18502/kls.v4i14.5663.