TY JOUR TI SIMULATE THE PROCESS AND SYSTEM WITH THE AID OF PETRI NETWORK KW fire safety KW mathematical model KW Petri network JO NATURAL AND MAN-MADE RISKS (PHYSICO-MATHEMATICAL AND APPLIED ASPECTS) AU Labinskiy, A.Y. AU Antoshina, T.N. PY 2019 IS 2019 PB Saint-Petersburg University of State Fire Service of Emercom of Russia