1. Bellotti, V., et al.: Making sense of sensing systems: five questions for designers and researchers. In: Proceedings of the SIGCHI conference on Human factors in computing systems: Changing our world, changing ourselves, Minneapolis, Minnesota, USA. ACM Press, New York (2002)
2. Barkhuus, L.: The context gap: An essential challenge to context-aware computing. In: Computer Science. The IT University of Copenhagen, Copenhagen (2005)
3. Dourish, P.: What we talk about when we talk about context. Personal Ubiquitous Comput. 8(1), 19–30 (2004)
4. Jones, G.J.F.: Challenges and Opportunities of Context-Aware Information Access. In: Proceedings of the International Workshop on Ubiquitous Data Management. IEEE Computer Society, Los Alamitos (2005)
5. Dey, A.K., Abowd, G.D.: Towards a Better Understanding of Context and Context-Awareness. In: The Workshop on The What, Who, Where, When, and How of Context-Awareness, as part of the 2000 Conference on Human Factors in Computing Systems (CHI 2000), The Hague, The Netherlands (2000)