1. S. Wang, J. Min, Byung K. Yi, Location-based services for mobiles: Technologies and standards, in: Proceedings of IEEE International Conference on Communication (ICC’08), Beijing, China, May 2008.
2. T. Gao, D. Greenspan, M. Welsh, R. Juang, A. Alm, Vital signs monitoring and patient tracking over a wireless network, in: Proceedings of The Second International Conference on Sensor Technologies and Applications (Sensorcomm’08), Cap Esterel, France, August 2008.
3. Ubisense, .
4. P. Bahl, V.N. Padmanabhan, RADAR: An in-building rf-based user location and tracking system, in: Proceedings of IEEE Conference on Computer Communications (INFOCOM’00), Tel Aviv, Israel, March 2000.
5. Z. Sahinoglu, S. Gezici, Ranging in the IEEE 802.15, 4a Standard, in: Proceedings of Wireless and Microwave Technology Conference (WAMICON’06), Clearwater, FL, USA, December 2006.