1. P. Wright, Gas Prices in the UK: Markets and Insecurity of Supply, Oxford Institute for Energy Studies, Oxford, UK: Oxford University Press, 2006.
2. The Effectiveness of Current Gas Security of Supply Arrangements: a Consultation, 16/10/2006;UK Department of Trade and Industry (DTI),2006
3. Managing the Energy Transition: a System Dynamics Search for Alternatives to Oil and Gas;Naill,1977
4. The Discovery Life Cycle of a Finite Resource: a Case Study of U.S. Natural Gas;Naill,1973
5. An experiment to evaluate methods for estimating fossil fuel resources;Sterman,1983