TY JOUR TI ASSESSMENT OF THE WORK OF ICEBREAKING FLEET IN THE VOLGA-CASPIAN SEAWAY CANAL KW icebreaking fleet KW harsh ice conditions KW theory of mass service KW theory of queues KW ship caravan JO Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies AU Temnikova, A.. PY 2014 IS 2014 PB Astrakhan State Technical University