1. Age Concern, 1994. On the move: transport, mobility and older people. Age Concern England, London.
2. ARP/050, 1998. Who goes free? Association of Retired Persons and Persons Over 50, London.
3. Balcombe, R.J., Astrop, A.J., Hill, E., 1998. Concessionary fares: trip generation among elderly passengers. TRL Report 366, Transport Research Laboratory, Crowthorne.
4. Bly, P.H., Hunt, P.B., Maycock, G., Mitchell, C.G.B., Porter, J., Allsop, R.E., 1995. Future scenarios for inland surface transport. TRL Report 130, Transport Research Laboratory, Crowthorne.
5. Measuring Health: a Review of Quality of Life Measurement Scales;Bowling,1997