Leitinger, R., M. L. Zhang, and S. M. Radicella. “An Improved Bottomside for the Ionospheric Electron Density Model NeQuick”. Annals of Geophysics 48, no. 3 (December 25, 2005). Accessed November 29, 2021. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3217.