?url_ver=Z39.88-2004&rft_id=doi%3A10.1046%2Fj.1365-246x.2000.00113.x&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Nicholson%2C+T.&rft.aulast=Nicholson&rft.aufirst=T.&rft.issue=1&rft.volume=142&rft.date=July+2000&rft.issn=0956-540X&rft.atitle=On+entropy+and+clustering+in+earthquake+hypocentre+distributions&rft.title=Geophysical+Journal+International&rft.pages=37-51&rft.genre=article