Effect of probiotic strains of Bacillus subtilis on the growth parameters of broiler chickens and caecal microbiotaAyslu Mardanova, Anastasia Nikolaeva, Guzel Lutfullina, Aygul Ganeeva and Margarita SharipovaE3S Web of Conf., 222 (2020) 02054DOI: https://doi.org/10.1051/e3sconf/202022202054