00693naa#a2200205#i#450# EN\INFRA-M\bibl\4076 20250204053734.2 2712-9640 20150317b2015####ek#y0engy0150####ca RUS RU Properties of the F2-layer maximum density variability over Irkutsk under different levels of the solar and geomagnetic activity Journal article Moscow INFRA-M Academic Publishing LLC. 2015 6 с. Journal article local Deminov Marat Garunovich Deminova Galina Fedorovna Zherebtsov Geliy Aleksandrovich Polekh Nelya Mihaylovna zh-szf.ru