TY JOUR TI ALGORITHM AND METHODOLOGY OF PORT DUES CALCULATION WITH REGARD TO THE LEVEL OF SEAPORTS COMPETITIVENESS KW seaports KW port dues KW tonnage dues KW infrastructure dues KW competitiveness of seaports JO Vestnik of Astrakhan State Technical University. Series: Economics AU Bodrovtseva, N.. AU Pantina, T.. PY 2017 IS PB Astrakhan State Technical University