1. ACI, Airport Council International, 2000. ACI traffic data. ACI [www.airport.org (21/10/2000)].
2. ACI, Airport Council International, 2004. ACI passenger traffic reports. ACI [http://www.airports.org (28/04/2004)].
3. Aircraft Emissions and the Environment: COx, SOx, HOx & NOx. OIES Papers on Energy and the Environment;Archer,1993
4. BAA, 2002. Heathrow delivering for London and the regions: a surface access strategy for Heathrow—the next five years. BAA, Annual progress report, May.
5. Buchanan, Partners, 1995. Optimising Rail/Air Intermodality in Europe. European Commission—DG VII, London, November.