1. World Population Prospects: The 2004 Revision (United Nations, Department of Economic and Social Affairs, Population Division, New York, 2005),
https://esa.un.org/unpd/wpp/
. Accessed 24 Feb 2005
2. International Energy Annual 1995 (U.S. Department of Energy, Washington, 1995),
http://www.eia.doe.gov/emeu/world/contents.html
. Accessed Dec 1996
3. UD-Led Team Sets Solar Cell Record (University of Delaware, Delaware, 2007),
http://www.udel.edu/PR/UDaily/2008/jul/solar072307.html
. Accessed 23 July 2007
4. Magic Solar Milestone Reached (UNSW Australia, 2008),
http://www.unsw.edu.au/news/pad/articles/2008/nov/Solarrecord.html
. Accessed 4 Nov 2008
5. K. Miyamoto, Plasma Physics for Nuclear Fusion, Revised edn. (MIT Press, Cambridge, 1987)