@article{Makarov2020geometric,
author={Makarov, G.A.},
title={Geometric factor in seasonal variations of daily average values of the geomagnetic index Dₛₜ},
journal={Solar-Terrestrial Physics},
publisher={INFRA-M Academic Publishing LLC.},
year={2020},
pages={50-56},
volume={6},
issue={4},
}