Mikhailov, A. V., B. A. de la Morena, G. Miro, and D. Marin. “A Comparison of f0F HmE Model Calculations With El Arenosillo Digisonde Observations. Seasonal Variations”. Annals of Geophysics 42, no. 4 (November 25, 1999). Accessed April 19, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3749.