TY JOUR TI Solar flares with sustained gamma-ray emission and some characteristics of high-energy proton fluxes KW flares KW coronal mass ejections KW particle acceleration JO Solar-Terrestrial Physics AU Tomozov, V.M. AU Minasyants, G.S. AU Minasyants, T.M. PY 2023 IS 9 PB INFRA-M Academic Publishing LLC.