00636naa#a2200193#i#450# EN\\bibl\68215 20241125035212.1 2218-130X 20150925b2015####ek#y0engy0150####ca RUS RU Effectiveness of systems for processing successive multifrequency signals in the extremely low frequencies noise Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2015 10 с. Journal article local Pus' V V Ivanov A V Danilova T V journals.igps.ru