TY - CONF AU - Stefan Michev BT - XIV International Scientific Conference Management and Engineering ’17 CY - Sozopol, Bulgaria DA - June 25-28, 2017 LA - eng PP - Sozopol, Bulgaria PY - 2017 SP - 467 EP - 475 T2 - XIV International Scientific Conference Management and Engineering ’17 TI - Protection of Critical Infrastructure – An Element of Security Policy ER -