@article {690,
	title = {Increases in the flux of carbon belowground stimulate nitrogen uptake and sustain the long-term enhancement of forest productivity under elevated CO2},
	journal = {Ecology letters},
	volume = {14},
	year = {2011},
	pages = {349-357},
	publisher = {Blackwell Publishing Ltd},
	isbn = {1461-0248},
	author = {John E. Drake and Gallet-Budynek, Anne and Hofmockel, Kirsten S. and Emily S. Bernhardt and Sharon A. Billings and Jackson, Robert B. and Johnsen, Kurt S and Lichter, John and McCarthy, Heather R and McCormack, M Luke}
}
