TY JOUR TI Estimation of Toxic Gases’ Density Increment in the Integral Mathematical Model of Initial Fire Stage in Buildings KW dangerous fire factors KW integral fire model KW fire initial stage KW differential equation KW toxic gases’ volume-averaged density JO Safety in Technosphere AU Fedorov, Y.I. AU Pavlidis, V.D. AU Urban, V.A. AU Yakovleva, E.V. PY 2020 IS 9 PB INFRA-M Academic Publishing LLC.