M. D.  Jennings, Loucks, O., Glenn-Lewin, D., Peet, R. K., Faber-Langendoen, D., Grossman, D., Damman, A., Barbour, M., Pfister, R., Walker, M., Talbot, S., Walker, J., Hartshorn, G., Waggoner, G., Abrams, M., Hill, A., Roberts, D., and Tart, D., ?Standards for Associations and Alliances of the U.S. National Vegetation Classification: Version 1.0?. Vegetation Classification Panel of the Ecological Society of America, 2002.