1. 1 Crookston, N.L.; Dixon, G.E. 2005. The forest vegetation simulator: a review of its structure, content, and applications. Computers and Electronics in Agriculture. 49: 60-80. https://doi.org/10.1016/j.compag.2005.02.003.
2. 2 Crookston, N.L.; Gammel, D.L.; Rebain, S.; Robinson, D.; Keyser, C.E.; Dahl, C.A.; David, L.R.; Shettles, M.A. 2003. Users guide to the database extension of the Forest Vegetation Simulator version 2.0. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Forest Management Service Center. 60 p.
3. 3 Crookston, N.L.; Stage, A.R. 1999. Percent canopy cover and stand structure statistics from the Forest Vegetation Simulator. Gen. Tech. Rep. RMRS-GTR-24. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 11 p. https://doi.org/10.2737/RMRS-GTR-24.
4. 4 Deal, R., ed. 2018. Dictionary of forestry. 2nd ed. Bethesda, MD: Society of American Foresters.
5. 5 Federal Geographic Data Committee, Vegetation Subcommittee 2022. U.S. National Vegetation Classification Database. https://usnvc.org/.