TY JOUR TI The event trees as a fire risk evaluator of residential sector KW fire risk KW normal distribution KW exponential distribution JO Problems of risk management in the technosphere AU Kuzyk, A.D. AU Karabyn, O.A. AU Emelianenko, S.A. PY 2013 IS 2013 PB Saint-Petersburg University of State Fire Service of Emercom of Russia