1. Blythe, P. T. (1997) Implementing Smart Card Technology to Transform Payment and Customer information. Proc. Intelligent Transportation Systems 4th World Congress, Berlin, Germany, October.
2. Blythe, P. T. (1998) DISTINCT: Extending the functionality of smart cards. Proc. Smart Card 1998, London, February.
3. Blythe, P. T., and Shield, C. M. (1999) DISTINCT: Developing the Business Case for a Citizen card and Providing Access for All. Proc. 6th 6th ITS Congress, Toronto, November.