RETRACTED: Review of studies on the use of synbiotic feed additives in compound feedsDmitry Rudoy, Victor Pakhomov, Tatyana Maltseva, Anastasiya Olshevskaya, Dzhuletta Sarkisian, Sirun Saakian and Anastasia TatarovaE3S Web Conf., 420 (2023) 02006DOI: https://doi.org/10.1051/e3sconf/202342002006