@article { 83,
	title = {Carbon-cycle feedbacks increase the likelihood of a warmer future},
	journal = {Geophysical Research Letters},
	volume = {34},
	year = {2007},
	doi = {10.1029/2006GL028685},
	url = {/files/tkg/files/83.matthews.carbonfeedback.f.pdf},
	author = {H. Damon Matthews and David Keith}
}
