TY JOUR TI TO THE QUESTION OF TECHNOGENIC RISK ASSESSMENT AT ITS REFINERY KW risk of an emergency KW fuzzy logic KW output fuzzy system JO Problems of risk management in the technosphere AU Shcherbakov, O.V. AU Labinskiy, A.Y. PY 2018 IS 2018 PB Saint-Petersburg University of State Fire Service of Emercom of Russia