@article{Polekh2019on, author={Polekh, N.M. and Chernigovskaya, M.A. and Yakovleva, O.E.}, title={On the formation of the F1 layer during sudden stratospheric warming events}, journal={Solar-Terrestrial Physics}, publisher={INFRA-M Academic Publishing LLC.}, year={2019}, pages={117-127}, volume={5}, issue={3}, }