00725naa#a2200205#i#450# EN\INFRA-M\bibl\42438 20260109224124.5 1998-071X 20200430b2020####ek#y0engy0150####ca RU Estimation of Toxic Gases’ Density Increment in the Integral Mathematical Model of Initial Fire Stage in Buildings Journal article Moscow INFRA-M Academic Publishing LLC. 2020 5 с. Journal article local Общие вопросы математических и естественных наук. 50 Fedorov Yu. I. Pavlidis V. D. Urban V. A. Yakovleva E. V. zh-szf.ru