?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Nyffenegger%2C+Paul&rft.aulast=Nyffenegger&rft.aufirst=Paul&rft.issue=5&rft.volume=88&rft.date=October+1998&rft.issn=0037-1106&rft.atitle=Recommendations+for+determining+p+values+for+aftershock+sequences+and+catalogs&rft.title=Bulletin+of+the+Seismological+Society+of+America&rft.pages=1144-1154&rft.genre=article