@article{Ponomarchuk2017features,
author={Ponomarchuk, S.N. and Kurkin, V.I. and Penzin, M.S.},
title={Features of backscatter ionospheric sounding as studied with a chirp ionosonde},
journal={Solar-Terrestrial Physics},
publisher={INFRA-M Academic Publishing LLC.},
year={2017},
pages={54-60},
volume={3},
issue={3},
}