TY  JOUR
TI  Low-power solar flares of optical and X-ray wavelengths for solar cycles 21–24
KW  solar activity
KW  solar flares
JO  Solar-Terrestrial Physics
AU  Borovik, A.V.
AU  Zhdanov, A.A.
PY  2020
IS  6
PB  Institute of Solar-Terrestrial Physics SB RAS