KOURIS, S. S. The dependence of ionospheric characteristics on the state of the solar-cycle. Annals of Geophysics, [S. l.], v. 41, n. 5-6, 1998. DOI: 10.4401/ag-3814. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3814. Acesso em: 25 apr. 2024.