Nicholas J. Belkin Amymarie Keller Diane Kelly Jose Perez Carballo C. Sikora Ying Sun Support for Question-Answering in Interactive Information Retrieval: Rutgers' TREC-9 Interactive Track Experience. 2000 TREC http://trec.nist.gov/pubs/trec9/papers/rutgers-int.pdf db/conf/trec/trec2000.html#BelkinKKCSS00