2215-2644 2215-2644 S2215-26442023000200254 10.15517/revedu.v47i2.53915 Federación de Rusia 00 12 2023 00 12 2023 47 2 254 284

2006 1986 2017 803 1 1 2016 8 50 50 48-50 1986 1981 2022 3 75 75 22-7 2017 2013 4 4 194-203 2006 2022 2008 2022 408-17 2019 2nd ed., revised. and additional 2009