00865naa#a2200229#i#450# EN\\bibl\30593 20260308075908.7 2500-0535 20190930b2019####ek#y0engy0150####ca RUS RU Solar activity research at the Baikal Astrophysical Observatory of ISTP SB RAS Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2019 10 с. Journal article local Астрономия. Астрофизика. Исследование космического пространства. Геодезия. 52 RUS Borovik Aleksandr Vasil'evich Golovko Aleksey Alekseevich Polyakov Vladimir Ivanovich Trifonov Viktor Dmitrievich Yazev Sergey Arkturovich zh-szf.ru