TY JOUR TI Quasi-periodic pulsations in solar and stellar flares. Review KW Sun KW solar activity KW solar flares KW stellar flares KW quasi-periodic pulsations JO Solnechno-Zemnaya Fizika AU Kupriyanova, E.G. AU Kolotkov, D.Y. AU Nakariakov, V.M. AU Kaufman, A.S. PY 2020 IS 6 PB INFRA-M Academic Publishing LLC.