@article{Kushnarenko2018electron,
author={Kushnarenko, G.P. and Yakovleva, O.E. and Kuznetsova, G.M.},
title={Electron density at F1-layer heights in the last solar minimum (2007–2009)},
journal={Solar-Terrestrial Physics},
publisher={INFRA-M Academic Publishing LLC.},
year={2018},
pages={61-63},
volume={4},
issue={1},
}