TY JOUR TI RUSSIAN EXPORTS AND IMPORTS OF TRADE PARTNERS: BILATERAL ASYMMETRIES IN STATISTICS KW export asymmetry KW bilateral asymmetry KW mirror statistics KW trade statistics JO Vestnik of Kazan State Agrarian University AU Narbut, V.V. AU Tolmachev, M.N. AU Shnaider, O.V. PY 2022 IS 17 PB Kazan state agrarian University