Muslim, Buldan, Haris Haralambous, Christina Oikonomou, and Sefria Anggarani. “Evaluation of a Global Model of Ionospheric Slab Thickness for FoF2 Estimation During Geomagnetic Storm”. Annals of Geophysics 58, no. 5 (November 11, 2015): A0551. Accessed November 27, 2021. https://www.annalsofgeophysics.eu/index.php/annals/article/view/6721.