00699naa#a2200181#i#450# EN\INFRA-M\bibl\30599 20240425132109.4 2500-0535 20190930b2019####ek#y0engy0150####ca ENG RU Heuristic model of solar X-ray spectrum according to satellite data for geophysical applications Journal article Moscow INFRA-M Academic Publishing LLC. 2019 11 с. Journal article local Астрономия. Астрофизика. Исследование космического пространства. Геодезия. 52 ENG Korsunskaja Julia Albertovna naukaru.ru