TY JOUR TI MATHEMATICAL MODEL OF DEFINITION OF THE COST OF THE COLLECTIVE FIRE RISK OF AUTOMOTIVE GAS FILLING STATIONS KW risk-oriented approach KW automobile gas stations JO Problems of risk management in the technosphere AU Fomin, A.V. AU Shakhmanov, F.F. PY 2018 IS 2018 PB Saint-Petersburg University of State Fire Service of Emercom of Russia