PACS:94.20.D−, 96.50.−e (all) DOI:10.1070/PU1968v010n04ABEH003706 URL: https://ufn.ru/en/articles/1968/4/i/ Citation: Bezrukikh V V, Breus T K, Gdalevich G L, Gorozhankin B N, Rudakov V A "Concerning the outer ionosphere and its transition into the interplanetary medium" Sov. Phys. Usp.10 602–605 (1968)