Belehaki, A. “Real Time Monitoring for Nowcasting and Forecasting Ionospheric Space Weatherin Europe With Ground Digisondes”. Annals of Geophysics 48, no. 3 (December 25, 2005). Accessed May 20, 2026. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3209.