00735naa#a2200205#i#450# EN\INFRA-M\bibl\57427 20241222184058.7 2500-0535 20230629b2023####ek#y0engy0150####ca ENG RU Spectral features of ionospheric plasma waves excited by powerful HF radio waves radiated at frequencies near electron gyroharmonics and F2-layer critical frequency Journal article Moscow INFRA-M Academic Publishing LLC. 2023 8 с. Journal article local Физика. 53 ENG Borisova Tatiana Dmitrievna Blagoveshchenskaya Nataly Fedorovna Kalishin Alexey Sergeevich zh-szf.ru