00633naa#a2200193#i#450# EN\\bibl\68045 20240921223202.6 2218-130X 20140325b2014####ek#y0engy0150####ca RUS RU Experimental research of PVC polymer materials’ coke residue through the CHNS elemental analysis method Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2014 4 с. Journal article local Berov K K Belshina Yu N Dementyev F A journals.igps.ru