"Use of Fire by Native Americans". The Southern Forest Resource Assessment Summary Report. Southern Research Station, USDA Forest Service. Archived from the original on 5 March 2014. Retrieved 21 July 2008.
Moncrieff, G. R., Scheiter, S., Langan, L., Trabucco, A., Higgins, S. I. (2016). The future distribution of the savannah biome: model-based and biogeographic contingency, Philos. T. R. Soc. B, 371, 2015.0311, 2016. link.
science.org
Staver, A.C., Archibald, S., Levin, S.A. (2011). The global extent and determinants of savanna and forest as alternative biome states. Science 334, 230–232. link.
"Use of Fire by Native Americans". The Southern Forest Resource Assessment Summary Report. Southern Research Station, USDA Forest Service. Archived from the original on 5 March 2014. Retrieved 21 July 2008.