Kouris, S. S., K. Barbatsi, T. D. Xenos, and B. Zolesi. “Correlations in Daily Deviations from the Median of f0F2, M(3000)F2 and VF”. Annals of Geophysics 37, no. 2 (November 25, 1994). Accessed April 20, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/4224.