Bodo Billerbeck Adam Cannane Abhijit Chattaraj Nicholas Lester William Webber Hugh E. Williams John Yiannis Justin Zobel RMIT University at TREC 2004. 2004 TREC http://trec.nist.gov/pubs/trec13/papers/rmit.tera.geo.pdf conf/trec/2004 db/conf/trec/trec2004.html#BillerbeckCCLWWYZ04