@Article{angeo-29-771-2011,
AUTHOR = {Maggiolo, R. and Echim, M. and De Keyser, J. and Fontaine, D. and Jacquey, C. and Dandouras, I.},
TITLE = {Polar cap ion beams during periods of northward IMF: Cluster statistical results},
JOURNAL = {Annales Geophysicae},
VOLUME = {29},
YEAR = {2011},
NUMBER = {5},
PAGES = {771--787},
URL = {http://www.ann-geophys.net/29/771/2011/},
DOI = {10.5194/angeo-29-771-2011}
}