TY JOUR TI SYSTEM-SYNERGETIC CONCEPT OF THE STRATEGIC MANAGEMENT OF THE ENTERPRISES’ FOREIGN ECONOMY ACTIVITY KW strategic management KW strategy KW foreign economy activity KW synergism KW system-synergetic concept KW effectiveness of strategy JO Vestnik of Astrakhan State Technical University. Series: Economics AU Shashlo, N.. AU Vildeman, A.. PY 2016 IS PB Astrakhan State Technical University