Gunasagaran, Rajeshkumar, Latifah Munirah Kamarudin, and Ammar Zakaria. “Wi-Fi For Indoor Device Free Passive Localization (DfPL): An Overview”. Indonesian Journal of Electrical Engineering and Informatics (IJEEI) 8, no. 1 (March 4, 2020): 103–111. Accessed October 28, 2026. https://section.iaesonline.com/index.php/IJEEI/article/view/1062.