Maune, D.F., S. M. Kopp, C.A. Crawford, and C.E. Zervas. Chapter 1; Introduction, in Maune, D.F. Ed. Digital Elevation Model Technologies and Applications: The DEM Users Manual. American Society of Photogrammetry and Remote Sensing. 2001. Bethesda, MD.
Johnston, K. M., S. M. Kopp, and C. Tucker; “Process, Simulation, Error, and Sensitivity Modeling Integrated in a Modeling Environment”, Proceedings of GeoComputation 2005; Ann Arbor, Michigan
Kopp, S.M. and N. Noman, Customizing and Serving GIS-Based Terrain Analysis Tools. Proceedings of American Water Resources Association Conference. 2004. Nashville, TN.