1. Reichenbacher, T.: Adaptive Concepts for a Mobile Cartography. Journal of Geographical Sciences, 43–53 (2001)
2. Brown, B., Laurier, E.: Designing Electronic Maps: An Ethnographic Approach. In: Meng, L., Zipf, A., Reichenbacher, T. (eds.) Map Design for Mobile Applications. Springer, Heidelberg (2004)
3. Abowd, G., Atkeson, C., Hong, J., Long, S., Kooper, R., Pinkerton, M.: Cyberguide: A Mobile Context-Aware Tour Guide. Wireless Networks 3, 421–433 (1997)
4. Cheverst, K., Davies, N., Mitchell, K., Friday, A., Efstratiou, C.: Developing a Context-Aware Electronic Tourist Guide: Some Issues and Experiences. In: Proceedings of CHI 2000, ACM Conference on Human Factors in Computing Systems, The Hague, The Netherlands, pp. 17–24 (2000)
5. Brown, B., Chalmers, M., Bell, M., MacColl, I., Hall, M., Rudman, P.: Sharing the Square: Collaborative Visiting in the City Streets. In: Proceedings of CHI 2005. ACM Conference on Human Factors in Computing Systems, Portland, USA (2005)