1. Determining user location for context aware computing through the use of a wireless LAN infrastructure;Smailagic,2000
2. Bahl P, Padmanabhan VN. RADAR: an in-building RF-based user location and tracking system. Proceedings IEEE INFOCOM 2000. Conference on Computer Communications. Nineteenth Annual Joint Conference of the IEEE Computer and Communications Societies 2000; 2:775-784.
3. A survey of indoor positioning systems for wireless personal networks;Gu;IEEE Communications Surveys Tutorials,2009
4. Indoor positioning technologies;Mautz,2012
5. Al-Ammar MA, Alhadhrami S, Al-Salman A, Alarifi A, Al-Khalifa HS, Alnafessah A, Alsaleh M. Comparative Survey of Indoor Positioning Technologies, Techniques, and Algorithms. Proceedings of the 2014 International Conference on Cyberworlds, Washington, DC, USA; 2014, 245-252.