Lee, L.C., J.R. Kan, and S.-I. Akasofu. “On the Origin of the Cusp Field-Aligned Currents”. Journal of Geophysics 57, no. 1 (August 29, 1985): 217-221. Accessed September 18, 2025. https://journal.geophysicsjournal.com/JofG/article/view/235.