@incollection{Kunitsyn13,
author = {Vyacheslav Kunitsyn and Elena Andreeva and Ivan Nesterov and Artem
Padokhin},
title = {Ionospheric Sounding and Tomography by GNSS},
booktitle = {Geodetic Sciences},
publisher = {IntechOpen},
address = {Rijeka},
year = {2013},
editor = {Shuanggen Jin},
chapter = {6},
doi = {10.5772/54589},
url = {https://doi.org/10.5772/54589}
}