Fear, R. C., S. E. Milan, R. Maggiolo, A. N. Fazakerley, I. Dandouras, S. B. Mende (2014), Direct observation of closed magnetic flux trapped in the high-latitude magnetosphere, Science, Vol. 346, 1506-1510, doi.org/10.1126/science.1257377 (pdf)
Fear, R. C., S. E. Milan, R. Maggiolo, A. N. Fazakerley, I. Dandouras, S. B. Mende (2014), Direct observation of closed magnetic flux trapped in the high-latitude magnetosphere, Science, Vol. 346, 1506-1510, doi.org/10.1126/science.1257377 (pdf)