• Cormen, T. H., Leiserson, C. E., Rivest, R. L., Stein, C. (2001). Introduction to Algorithms. MIT Press and McGraw-Hill.
  • Cui, H. (2008a). Approaches to Semantic Mark up for Natural Heritage Literature. Proceedings of the iConference 2008.
  • Cui, H. (2008b). Unsupervised Semantic Markup of Literature for Biodiversity Digital Libraries. Proceedings of the 8th ACM/IEEE-CS Joint Conference on Digital libraries, (pp. 2528).
  • Kiger, R. W., Porter, D. M. (2001). Categorical Glossary for the Flora of North America Project. Retrieved January 3, 2009, from
  • SDD. (2008). SDD Wiki. Retrieved July 10, 2008, from TDWG Wiki:
  • Tang, X., Heidorn, P. B. (2007). Using Automatically Extracted Information in Species Page Retrieval. Retrieved July 10, 2008, from Proceedings of TDWG 2007: