1. Schilit, B., Adams, N., Want, R.:Context-Aware Computing Applications. Proc.Workshop on Mobile Computing Systems and Applications, Santa Cruz, CA,U.S.(1994)
2. Brown, P.J., Bovey, J.D., Chen, X.: Context-aware applications: from the laboratory to the market place. IEEE Personal Communications, Vol. 4, No. 5 (1997) 58–64
3. Want, R., Schilit, B., Adams, N., Gold, R., et al: The ParcTab Ubiquitous Computing Experiment, Technical Report CSL-95-1, Xerox Palo Alto Research Center (1995)
4. Dey, A.K., Salber, D., Futakawa, M., Abowd, G.D.: An Architecture To SupportContext-Aware Applications. Georgia Tech, Technical Report GIT-GVU-99-23 (1999)
5. Holmquist, L.: Supporting Group Collaboration with IPAD:s-Inter-Personal Awareness Devices. Proc. Workshop on Handheld CSCW, ACM CSCW’98 Conference on Computer Supported Cooperative Work,Seattle, Washington. (1998) 37–43