PACS:94.20.Bb, 94.20.ws, 94.30.Tz (all) DOI:10.1070/PU1961v003n05ABEH005809 URL: https://ufn.ru/en/articles/1961/5/f/ Citation: Gershman B N, Ugarov V A "Propagation and generation of low-frequency electromagnetic waves in the upper atmosphere" Sov. Phys. Usp.3 743–764 (1961)