00548naa#a2200181#i#450# EN\\bibl\66468 20240920005614.5 1998-8990 20130925b2013####ek#y0engy0150####ca RUS RU MODELING OF EMERGENCIES ON THE BASIS OF PETRI NET Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2013 4 с. Journal article local Artamonov V S Ivanov A Yu journals.igps.ru