1. Oil: a bumpy road ahead;Aleklett;World Watch Magazine,2006
2. The social and natural environment of fossil capitalism;Altvater,2007
3. ASPO-USA, 2009. Peak Oil Review, vol. 4, no. 41, October 19.
4. Association for the Study of Peak Oil, 2008. Newsletter No. 87. .
5. States, Firms and Raw Materials: The World Economy and Ecology of Aluminium,1994