1. The distribution and query systems of the RCSB Protein Data Bank
2. (2002). Reference Directed Indexing: Indexing scientific literature in the context of its use. Unpublished doctoral dissertation, Northwestern University, Evanston, IL.
3. (2003). Reference directed indexing: Redeeming relevance for subject search in citation indexes. In Proceedings of the 7th European Conference on Research and Advanced Technology for Digital Libraries.
4. http://www.springerlink.com/content/5hi073kcydn5901x/
5. A survey of current work in biomedical text mining