PACS:96.60.qe, 96.60.Ub, 96.60.Vg, 94.20.wq, 90.00.-x (all) DOI:10.1070/PU1988v031n05ABEH003554 URL: https://ufn.ru/en/articles/1988/5/k/ Citation: Ivanov-Kholodnyi G S "Problems of solar-terrestrial physics and research on the ionosphere" Sov. Phys. Usp.31 477–478 (1988)