FEICHTER, E.; LEITINGER, R. Properties of the main trough of the F region derived from Dynamic Explorer 2 data. Annals of Geophysics, [S. l.], v. 45, n. 1, 2002. DOI: 10.4401/ag-3491. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3491. Acesso em: 9 aug. 2022.