Keiling, A., Parks, G. K., Rème, H., Dandouras, I., Bosqued, J. M., Wilber, M., McCarthy, M., Mouikis, C., Amata, E., Klecker, B., Korth, A., Lundin, R., & Frey, H. U. (2005). Bouncing ion clusters in the plasma sheet boundary layer observed by Cluster-CIS. Journal Geophysical Research, 110(A9):. doi:10.1029/2004JA010497.