?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Clarke&rft.au=Clarke%2C+KE&rft.aufirst=KE&rft.date=7+December+2006&rft.atitle=Cassini+observations+of+planetary-period+oscillations+of+Saturn's+magnetopause&rft.volume=33&rft.issue=23&rft.title=Geophysical+Research+Letters&rft.issn=0094-8276&rft.genre=article