e, M., Matsuoka, A., Kumamoto, A., Kasahara, Y., Goldstein, J., Teramoto, M., et al. (2018). Longitudinal Structure of Oxygen Torus in the Inner Magnetosphere: Simultaneous Observations by Arase and Van Allen Probe A. Geophysical Research Letters, 177-10. http://doi.org/10.1029/2018GL080122 (Original work published October 2018)
Mitani, K., Seki, K., Keika, K., Gkioulidou, M., Lanzerotti, L., Mitchell, D., et al. (2019). Statistical Study of Selective Oxygen Increase in High-Energy Ring Current Ions During Magnetic Storms. Journal Of Geophysical Research: Space Physics. http://doi.org/10.1029/2018JA026168 (Original work published April 2019)