TY JOUR TI INTEGRATED ECONOMIC SYSTEMS: THE DIVERSITY OF APPROACHES TO THE CHARACTERIZATION AND CLASSIFICATION KW integration KW integrated economic systems KW U-form KW H-form KW M-form KW V-form KW transaction costs KW classification JO Vestnik of Astrakhan State Technical University. Series: Economics AU Pustynnikova, Y.. AU Baklushinsky, V.. PY 2016 IS PB Astrakhan State Technical University