GREGORI, G. P. The external magnetic sources over the polar caps - Feasible modelling unrealistic expectations. Annals of Geophysics, [S. l.], v. 42, n. 2, 1999. DOI: 10.4401/ag-3712. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3712. Acesso em: 5 may. 2024.