X. Tian, Y. Yu, F. Gong, L. Ma, J. Cao, S. C. Solomon, P. R. Shreedevi, K. Shiokawa, Y. Otsuka, S.-i. Oyama, and Y. Miyoshi. Ionospheric Modulation by EMIC Wave-Driven Proton Precipitation: Observations and Simulations. Journal of Geophysical Research: Space Physics, volume 128, issue 1, 2023 . S. R. Kaeppler, D. L. Hampton, M. J. Nicolls, A. Strømme, S. C. Solomon, J. H. Hecht, and M. G. Conde. An investigation comparing ground-based techniques that quantify auroral electron flux and conductance. J. Geophys. Res. Space Physics, volume 120, pages 9038-9056, 2015 . R. H. Varney, S. C. Solomon, and M. J. Nicolls. Heating of the sunlit polar cap ionosphere by reflected photoelectrons. J. Geophys. Res., volume 119, pages 8660-8684, 2014 .