STANISLAWSKA, I.; JUCHNIKOWSKI, G.; CANDER, L. R. The Kriging method of ionospheric parameter f0F2 instantaneous mapping. Annals of Geophysics, [S. l.], v. 39, n. 4, 1996. DOI: 10.4401/ag-4007. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4007. Acesso em: 18 sep. 2021.