Okapi at TREC-6 Automatic ad hoc, VLC, routing, filtering and QSDR.

Steve Walker Stephen E. Robertson Mohand Boughanem Gareth J. F. Jones Karen Sparck Jones Okapi at TREC-6 Automatic ad hoc, VLC, routing, filtering and QSDR. 125-136 1997 TREC http://trec.nist.gov/pubs/trec6/papers/city_proc_auto.ps db/conf/trec/trec97.html#WalkerRBJJ97