TY JOUR TI SHADOW ECONOMY AND ITS NEGATIVE INFLUENCE ON ECONOMIC SECURITY OF THE RUSSIAN FEDERATION KW hadow economy KW economic security KW corruption crime JO Vestnik of Astrakhan State Technical University AU Ilyasova, R.. AU Tulegenova, A.. AU Ishkov, Y.. PY 2018 IS 2018 PB Astrakhan State Technical University