Zeitschriftenartikel
Joko, S.; Nilsson, H.; Lundin, R.; Popielawska, B.; Rème, H.; Bavassano-Cattaneo, M.-B.; Paschmann, G.; Korth, A.; Kistler, L. M.; Parks, G. K.: Shell-like configuration in O
+ ion velocity distribution at high altitudes in the dayside magnetosphere observed by Cluster/CIS. Annales Geophysicae
22 (7), S. 2473 - 2483 (2004)