00694naa#a2200205#i#450# EN\\bibl\69647 20241109173058.6 2587-9936 20230912b2023####ek#y0engy0150####ca RU On the Precursors of Solar Flares in September 2017 Journal article Sevastopol Federal State Educational Institution of Higher Education Sevastopol State University 2023 6 с. Journal article local Солнце. Физика Солнца. 523.9 Volvach Alexander Evgen'evich Kogan Lev P. Volvach Larisa Nikolaevna Yakubovskaya Inna V. rusjbpc.ru