00769naa#a2200217#i#450# EN\INFRA-M\bibl\45034 /en/manage/index 20250302234336.7 2712-9640 20211220b2021####ek#y0engy0150####ca RUS RU Complexes of activity on the Sun in solar cycle 21 Journal article Moscow INFRA-M Academic Publishing LLC. 2021 6 с. Journal article local Астрономия. Астрофизика. Исследование космичечского пространства. 520 RUS Yazev Sergey Arkturovich Ulianova Maria Mihaylovna Isaeva Elena Sergeevna test.editorum.ru /en/manage/index