@article{Makarov2020geometric,
author={Makarov, G.A.},
title={Geometric factor in seasonal variations of daily average values of the geomagnetic index Dₛₜ},
journal={Solnechno-Zemnaya Fizika},
publisher={Institute of Solar-Terrestrial Physics SB RAS},
year={2020},
pages={59-66},
volume={6},
issue={4},
}