00555naa#a2200169#i#450# EN\\bibl\68758 20250506055408.2 2307-7476 20171225b2017####ek#y0engy0150####ca RUS RU THE QUESTIONS OF MATHEMATICAL MODELING IN TASKS OF SAFETY OF COMPLEX TECHNICAL SYSTEMS Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2017 4 с. Journal article local Kalinina E S journals.igps.ru