1. Intergovernmental Panel on Climate Change (IPCC). Climate change—the IPCC scientific assessment. In: Houghton JT, Jenkins GJ, Ephraums JJ, editors. Cambridge: Cambridge University Press; 1990.
2. Intergovernmental Panel on Climate Change (IPCC). Land use, land-use change, and forestry—a special report of the intergovernmental panel on climate change. In: Watson RT, Noble IR, Bolin B, Ravindranath NH, Verardo DJ, Dokken DJ, editors. Cambridge: Cambridge University Press; 2000.
3. Birdsey RA, Heath LS. Carbon changes in US forests. In: Joyce LA, editor. Climate change and the productivity of America’s forests (Gen. Tech. Rep. RM-GTR-271). Fort Collins: USDA Forest Service, Rocky Mountain Research Station; 1995.
4. Delcourt HR, Harris WF. Carbon budget of the southeastern US biota: analysis of historical change in trend from source to sink. Science. 1980;210:321–3.
5. Fan S, Gloor M, Mahlman J, Pacala S, Sarmiento J, Takahashi T, Tans P. A large terrestrial carbon sink in North America implied by atmospheric and oceanic carbon dioxide data and models. Science. 1998;282:442–6.