1. Parsing by chunks;Abney,1991
2. Ramshaw LA, Marcus MP. Text chunking using transformation-based learning. In: Proceedings of the third ACL workshop on very large corpora. Cambridge, USA; 1995. p. 82–94.
3. Pratt W, Yetisgen-Yildiz M. A study of biomedical concept identification: MetaMap vs. people. In: Proceedings of the AMIA annual symposium. Washington; 2003. p. 529–33.
4. I2b2. 2010 i2b2/VA Challenge Evaluation. Concept annotation guidelines. [cited 10.06.10].
5. Zhou GD, Su J. Named entity recognition using an HMM-based chunk tagger. In: Proceedings of the 40th annual meeting on association for computational linguistics. Morristown, USA; 2001. p. 473–80.