00647naa#a2200193#i#450# EN\\bibl\52898 20250131182615.5 2587-9936 20200325b2020####ek#y0engy0150####ca RUS RU Observations of flare activity of the Sun on September 6, 2017 Journal article Sevastopol Federal State Educational Institution of Higher Education Sevastopol State University 2020 8 с. Journal article local Солнце. Физика Солнца. 523.9 RUS Volvach Alexandr E Yakubovskaya Inna V rusjbpc.ru