TY JOUR TI Spectra of variations and cosmic ray anisotropy during GLE of June 11, 1991 KW heliosphere KW cosmic rays KW solar activity JO Solnechno-Zemnaya Fizika AU Kravtsova, M.V. AU Sdobnov, V.E. PY 2015 IS 1 PB INFRA-M Academic Publishing LLC.