1. Guyatt, G. H., Sackett, D., and Cook, D. J., How to use an article about therapy or prevention. http://www.cche.net/usersguides/therapy.asp .
2. Pitkin, R. M., Branagan, M. A., and Burmeister, L. F., Accuracy of data in abstracts of published research articles. JAMA 281(12):1110–1111, 1999.
3. Haynes, D., Metadata For Information Management And Retrieval. Facet Publishing: London, 2004.
4. Understanding Metadata. NISO Press: Bethesda, 1–3, 2004.
5. Hillmann, D., Using Dublin core. http://dublincore.ore/documents/usageguide/ .