KERSLEY, L. Ionospheric tomography and its applications in radio science and geophysical investigations. Annals of Geophysics, [S. l.], v. 48, n. 3, 2005. DOI: 10.4401/ag-3218. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3218. Acesso em: 27 nov. 2021.