1. McPhee, John. Assembling California. Farrar, Straus and Giroux: New York, NY. 1993.
2. Janée, Greg and James Frew. The ADEPT Digital Library Architecture. Proceedings of the Second ACM/IEEE-CS Joint Conference on Digital Libraries (JCDL’ 02), Portland, OR, July 14–18, 2002.
3. Cai, Guoray. GeoVIBE: A Visual Interface to Geographic Digital Library. Proceedings of the First Visual Interfaces to Digital Libraries Workshop, Roanoke, VA. June 28, 2001.
4. Koller, David, with Peter Lindstrom, William Ribarsky, Larry F. Hodges, Nick Faust, and Gregory Turner. 1995. Virtual GIS: A Real-Time 3D Geographic Information System. Proceedings of Visualization’ 95. GVU Technical Report 95-14.
5. Herman, Ivan, with Guy Melançon and M. Scott Marshall. 2000. Graph Visualization and Navigation in Information Visualization: A Survey. IEEE Transactions on Visualization anc Computer Graphics, Vol. 6 No. 1, January–March 2000.