References

1. R. Westrum, Technologies & Society: The Shaping of People and Things, Belmont, Calif.: Wadsworth Publishing Company, 1991.

2. K. Konkka and A. Koppinen, Nokia Mobile Phones, Finland, 'Mobile Devices-Exploring Cultural Differences in Separating Professional and Personal Time,' in IWIPS Proceedings, Baltimore, Md., 2000.

3. H. Beyer, and K. Holtzblatt, Contextual Design: Defining Customer-Centered Systems. San Francisco: Morgan Kaufmann, 1998.

4. S. Ruuska, 'Mobile Communication Devices for International Use-Exploring Cultural Diversity through Contextual Inquiry,' in IWIPS Proceedings, USA, 1999.