1. 3GPP Technical Specification Group Services and System Aspects. Service Aspects; Stage 1 Service Requirements for the Open Service Access (OSA) - Release 4. Technical report, 3rd Generation Partnership Project (3GPP) (March 2002)
2. Anerousis, N.: Pervasive Computing. In: Tutorial at the 8th IFIP/IEEE International Symposium on Integrated Network Management, IM 2003 (March 2003)
3. Buchholz, T., Küpper, A., Schiffers, M.: Quality of Context Information: What it is and why we need it. In: Proceedings of the 10th HP–OVUA Workshop, Geneva, Switzerland (July 2003)
4. Cranor, L., Langheinrich, M., Marchiori, M., Presler-Marshall, M., Reagle, J.: The Platform for Privacy Preferences 1.0 (P3P1.0) Specification. W3C Recommendation REC-P3P-20020416, W3C (April 2002)
5. Dey, A.K.: Providing Architectural Support for Building Context-Aware Applications. PhD thesis, Georgia Institute of Technology (November 2000)