?url_ver=Z39.88-2004&rft_id=doi%3A10.1029%2F2005JB003621&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Sornette%2C+Didier&rft.aulast=Sornette&rft.aufirst=Didier&rft.issue=B9&rft.volume=110&rft.date=22+September+2005&rft.issn=0148-0227&rft.atitle=Apparent+clustering+and+apparent+background+earthquakes+biased+by+undetected+seismicity&rft.title=Journal+of+Geophysical+Research&rft.genre=article