@article{Potapov2020ultra,
author={Potapov, A.S. and Guglielmi, A.V. and Dovbnya, B.V.},
title={Ultra low frequency emissions ranging from 0.1 to 3 Hz in circumpolar areas},
journal={Solar-Terrestrial Physics},
publisher={INFRA-M Academic Publishing LLC.},
year={2020},
pages={40-45},
volume={6},
issue={3},
}