Effectiveness of using Elevit feed additive in pig feeding Gregory Pokhodnya, Vitaliy Seleznyov, Oksana Popova, Natalya Maslova and Alla Khokhlova E3S Web Conf., 176 (2020) 01005 Published online: 22 June 2020 DOI: 10.1051/e3sconf/202017601005