1. Carter S. 2009. Socio-economic Benefits in Plan Vivo Projects: Trees for Global Benefits, Uganda. Plan Vivo Foundation and ECOTRUST.
2. Kumar P, ed. 2010. The Economics of Ecosystems and Biodiversity: Ecological and Economic Foundations. Earthscan.
3. Larson B. 2011. Metaphors for Environmental Sustainability: Redefining our Relationship with Nature. Yale University Press.
4. Lovelock J. 2000. Gaia: A new look at life on Earth. Oxford University Press.
5. [MA] Millennium Ecosystem Assessment. 2005. Ecosystem and Human Well-being: Synthesis. Island Press.