WARNANT, Rene et al. Mitigation of ionospheric effects on GNSS. Annals of Geophysics, [S. l.], v. 52, n. 3-4, p. 373–390, 2009. DOI: 10.4401/ag-4585. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4585. Acesso em: 13 may. 2026.