00598naa#a2200181#i#450# EN\\bibl\40930 20240505235310.7 2307-1400 20201205b2020####ek#y0engy0150####ca RU Polyharmonic signals and their properties Journal article Saint-Petersburg Strategy of the Future 2020 13 с. Journal article local Различные отрасли промышленности и ремесла. 68 Butyrskiy Evgeniy Yurievich Rahuba Vitaliy Pavlovich futurepubl.ru