Question Answering: CNLP at the TREC-9 Question Answering Track. - Anne Diekema; Xiaoyong Liu; Jiangping Chen; Hudong Wang; Nancy J. McCracken; Özgür Yilmazel; Elizabeth D. Liddy (TREC, 2000)

Experiments in Novelty, Genes and Questions at the University of Iowa. - David Eichmann; Padmini Srinivasan; Marc Light; Hudong Wang; Xin Ying Qiu; Robert J. Arens; Aditya Kumar Sehgal (TREC, 2003)