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2. Some determinants of the propensity to interact in an urban system: a case study of Jos, Nigeria;Ayeni;Nigerian Geographical Journal,1975
3. Elderly Mobility and Safety – The Michigan Approach: Final Plan of Action;Bruff,1999
4. European Conference of Ministers of Transport (ECMT), 2001. Transport and Ageing of the Population. Report of ECMT Working Group on Transport for People with Mobility Handicaps Presented to ECMT Ministers of Transport, Lisbon, May 2001.
5. Traffic Safety and the Drivers;Evans,1991