Purucker, M., Langlais, B., Olsen, N., Hulot, G. & Mandea, M.: The southern edge of cratonic North America: Evidence from new satellite magnetometer observations, Geophys.Res.Lett., 29(15), 8000, doi:10.1029/2001GL013645, 2002 [part of a special issue on results from the Ørsted satellite. Plate 3 from this paper is the cover of a special Ørsted issue on 1 august 2002 (Issue #15).]
