00570naa#a2200181#i#450# EN\\bibl\4757 20260311074112.3 2712-9640 20150317b2015####ek#y0engy0150####ca RUS RU Spectra of variations and cosmic ray anisotropy during GLE of June 11, 1991 Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2015 5 с. Journal article local Kravtsova Marina Vladimirovna Sdobnov Valeriy Evgen'evich ras.editorum.ru