GULYAEVA, T.; SPALLA, P. Enhanced variability in the topside ionosphere. Annals of Geophysics, [S. l.], v. 38, n. 3-4, 1995. DOI: 10.4401/ag-4104. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4104. Acesso em: 1 dec. 2021.