1. Balcombe, R., Mackett, R., Paulley, N., Preston, J., Shires, J., Titheridge, H., Wardman, M., White, P., 2004. The Demand for Public Transport: A Practical Guide. Report TRL593 of the Transport Research Laboratory (TRL), London.
2. Baumgartner, J.P., 2001. Prices and Costs in the Railways Sector, Laboratoire d’Intermodalité des Transports et de Planification, École Polytechnique Fédérale de Lausanne, Lausanne.
3. Trip end models of local rail demand in England and Wales;Blainey;J. Transp. Geogr.,2010
4. City of Cape Town (COC), 2011. BRT Infrastructure in Cape Town, Conference Presentation, Southern African Transport Conference 11. to 14. July 2011 in Pretoria.
5. The effectiveness and costs of speed reductions on emissions from international shipping;Corbett;Transp. Res. Part D: Transp. Environ.,2009