The feasibility of using a probiotic to increase the egg productivity of chickensOlga Krotova, Olga Sangadzhieva, Olga Kedeeva, Kermen Khalgaeva and Amulanga ManzhikovaE3S Web Conf., 363 (2022) 03042DOI: https://doi.org/10.1051/e3sconf/202236303042