Kimball et al. (2007)
Also: Kimball 2007
Seventeen years of carbon dioxide enrichment of sour orange trees: final results
Kimball, B. A., Idso, S. B., Johnson, S., & Rillig, M. C. (2007). Seventeen years of carbon dioxide enrichment of sour orange trees: final results. Global Change Biology, 13(10), 2171-2183. doi:10.1111/j.1365-2486.2007.01430.x
References
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.