1. AEA Technology (2004) An Evaluation of the air quality strategy. Report to the Department for Environment, Food and Rural Affairs (DEFRA), London
2. Aronsson T, Johansson P-O and Lofgren K-G (1997). Welfare measurement, sustainability and green national accounting. Edward Elgar, Cheltenham
3. Asheim G and Weitzman M (2001). Does NNP growth indicate welfare improvement. Econ Lett 73: 233–239
4. Bateman IJ, Day B and Lake I (2004). The valuation of transport-related noise in Birmingham. Report to the Department of Transport, London
5. British Petroleum (2001). Statistical review of world energy. BP plc, London