Efficiency of feed use by broiler chickens of the “Cobb-500” cross when feeding a probiotic preparationIvan Koschayev, Christina Mezinova, Nadezhda Sorokina, Antonina Ryadinskaya, Natalia Ordina and Sergey ChuyevE3S Web Conf., 273 (2021) 02009DOI: https://doi.org/10.1051/e3sconf/202127302009