1. 1)農林水産省HP: http://www.maff.go.jp/j/biomass/index.html
2. 2)国連HP: http://www.un.org/esa/sustdev/
3. 3)Commission on Sustainable Development, "CSD indicators of sustainable development- 3rd edition", (2007)
4. 4)United Nation Energy, "Sustainable Bioenergy: A Framework for Decision Makers", (2007)
5. 5)IEA Bioenergy ExCo54 Doc, "Task29 Socio-Economic Drivers in Implementing Bioenretgy Projects", (2005)