?url_ver=Z39.88-2004&rft_id=10.1111%2Fj.1365-2966.2007.11617.x&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=You%2C+XP&rft.aulast=You&rft.aufirst=XP&rft.issue=2&rft.volume=378&rft.date=2007&rft.issn=0035-8711&rft.atitle=Dispersion+measure+variations+and+their+effect+on+precision+pulsar+timing&rft.title=Monthly+Notices+of+the+Royal+Astronomical+Society&rft.pages=493-506&rft.genre=article