M. Gad-el-Hak, Flow Control: Passive, Active, and Reactive Flow Management, Cambridge University Press, London, 2000.
	P. B. Weisz, “Basic choices and constraints on long-term energy supplies,” Physics Today, 57(7), pp. 47-52, 2004.
	International Energy Outlook 2007, Energy Information Administration, U.S. Department of Energy, report number DOE/EIA-0484, 2007.
	Annual Energy Outlook 2008, Energy Information Administration, U.S. Department of Energy, report number DOE/EIA-0383, 2008.
	J. Fargione, J. Hill, D. Tilman, S. Polasky, and Peter Hawthorne, “Land clearing and the biofuel carbon debt,” Science 319(5867), pp. 1235-1238, 2008. CrossRef
	P. V. Domenici, “Meeting our long-term energy needs through Federal R&D,” APS News 15(9), p. 8, 2006.