1M. Hazas. J. Scott, and J. Krumm. Location-Aware Computing Comes of Age. IEEE Computer Magazine, 37(2):95- 97, Feb, 2004
2Microsoft Research Home. The Easy Living System. https:// researeh.microsoft.com/easyliving/, 2000-06
3AT&T Laboratories Cambridge. The Active Badge System. http ://www.uk research.att.com/ab.html, 2002-07
4Ni L M, Liu Yunhao, Yiu Cho Lau, et al. LANDM ARC: Indoor Location Sensing Using Active RFID IEEE International Conference on Pervasive Computing and Communications,2003-03
5AT&T Laboratories Cambridge. The BAT Ultrasonic Location System. http ://www. uk.research .att.com/bat/, 2001-09
6Bahl, P. and Padmanabhan, V. N. (2000). RADAR: An In-Building RF-Based User Location and Tracking System. In INFOCOM (2) : 775-784
7Rermta Bandelloni. Bluetooth Indoor Positioning System (BIPS), Trento, http://www.wilmaproiect.org/publications/ BIP&pdf, 2002/1Q/o3
