1. The active badge location system
2. HightowerJ.WantandR. andBorrielloG.: ‘SpotON: An indoor 3D location sensing technology based on RF signal strength’.UW CSE00‐02‐02 February 2000 http://www.cs.washington.edu/homes/jeffro/pubs/hightower2000indoor/hightower2000indoor.pdf
3. ElnahrawyE.LiX. andMartinR.: ‘The limits of localization using rssi’.Proc. of SECON 2004
4. KurthD.KanturG. andSingthS.: ‘Experimental results in range only Localization with radio’.IEEE/RSJ Int. Conf. on Intelligent Robots and Systems October 2003 vol.1 pp.974–979 ISBN 0‐7803‐7860
5. GPS-less low-cost outdoor localization for very small devices