Journal Article
Pulkkinen, T. I.; Ganushkina, N. Y.; Baker, D. N.; Turner, N. E.; Fennell, J. F.; Roeder, J.; Fritz, T. A.; Grande, M.; Kellett, B.; Kettmann, G.: Ring current ion composition during solar minimum and rising solar activity: Polar/CAMMICE/MICS results. Journal Geophysical Research
106, p. 19131 (2001)