Optimization of customs and tariff policy instruments in the system of import substitution in the agricultural sectorAlexander Kotenev, Larisa Ustinova, Galina Zakharova, Alim Otarov and Natalya KryzhevskayaE3S Web Conf., 164 (2020) 11040DOI: https://doi.org/10.1051/e3sconf/202016411040