1. Ch. Chieh, "Indoor Positioning System with BLE and Wi-Fi technology data Analysis and Accuracy Improvement," Prague, Czech Technical University, May 2017.
2. Th.Vandenabeele, "Study of Wi-Fi Fingerprint-Based Indoor Positioning on a smartphone," Belgium, Hasselt University and KULeuven, June 2017.
3. L. I. Khalil, "Indoor Positioning and Tracking based on the Received Signal Strength," Duisburg-Essen, Department of Electrical Engineering and Information Technology the university, May 2017.
4. A. Aboodi and T. Ch. Wan, " Evaluation of WiFi-based Indoor (WBI) Positioning Algorithm," IEEE Transactions On Systems, Malaysia, 2012.
5. H. Zou, X. Lu, H. Jiang, and L. Xie, " A Fast and Precise Indoor Localization Algorithm Based on an Online Sequential Extreme Learning Machine," Sensors, pp. 1805-1824, January 2015.