TY JOUR TI Features of development of sustained fluxes of high-energy gamma-ray emission at different stages of solar flares KW flares KW coronal mass ejection KW particle acceleration KW gamma-ray emission JO Solar-Terrestrial Physics AU Minasyants, G.S. AU Minasyants, T.M. AU Tomozov, V.M. PY 2019 IS 5 PB INFRA-M Academic Publishing LLC.