?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Nordheim%2C+TA&rft.aufirst=TA&rft.aulast=Nordheim&rft.volume=41&rft.date=28+October+2014&rft.issue=20&rft.atitle=Detection+of+a+strongly+negative+surface+potential+at+Saturn's+moon+Hyperion&rft.issn=0094-8276&rft.title=GEOPHYSICAL+RESEARCH+LETTERS&rft.pages=7011+-+7018&rft.genre=article