Zolesi, B., and L. R. Cander. “COST 271 Action - Effects of the Upper Atmosphere on Terrestrial and Earth-Space Communications: Introduction”. Annals of Geophysics 47, no. 2-3 Sup. (December 25, 2004). Accessed April 16, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3278.