Evaluation of the combined and separate action of the Quercus cortex extract and an antibiotic on the amino acid composition of broilers’ muscle tissueGalimzhan Duskaev, Olga Kvan, Shamil Rakhmatullin, Elena Sheida and Irina GavrishE3S Web Conf., 118 (2019) 01018DOI: https://doi.org/10.1051/e3sconf/201911801018