ROMANO, V.; CERRONE, M.; PERRONE, L.; PIETRELLA, M. Magnetic and solar effects on ionospheric absorption at high latitude. Annals of Geophysics, [S. l.], v. 45, n. 1, 2002. DOI: 10.4401/ag-3486. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3486. Acesso em: 9 aug. 2022.