Yupeng Fu Wei Yu Yize Li Yiqun Liu Min Zhang Shaoping Ma THUIR at TREC 2005: Enterprise Track. 2005 TREC http://trec.nist.gov/pubs/trec14/papers/tsinghuau-ma.ent.pdf conf/trec/2005 db/conf/trec/trec2005.html#FuYLLZM05