Product Named Entity Recognition Based on Hierarchical Hidden Markov Model. - Feifan Liu; Jun Zhao 001; Bibo Lv; Bo Xu 002; Hao Yu (SIGHAN@IJCNLP 2005, 2005)

NLPR at TREC 2005: HARD Experiments. - Bibo Lv; Jun Zhao (TREC, 2005)