D. Abberley, S. Renals, G. Cook, and A. Robinson. TREC, volume 500-240 of NIST Special Publication, page 747-752. National Institute of Standards and Technology (NIST), (1997)
D. Abberley, S. Renals, G. Cook, and A. Robinson. TREC, volume 500-242 of NIST Special Publication, page 128-137. National Institute of Standards and Technology (NIST), (1998)