Zong, Q.-G., Fritz, T. A., Spence, H., Oksavik, K., Pu, Z.-Y., Korth, A., et al. (2004). Energetic particle sounding of the magnetopause: A contribution by Cluster/RAPID. Journal Geophysical Research, 109(A4): A04207. doi:10.1029/2003JA009929.