Yang, Jingjing, Zhenyu Feng, Xuchao Ma, and Xiao Zhang. “Indoor Positioning Method Based on Wireless Signal”. International Journal of Online and Biomedical Engineering (iJOE) 14, no. 10 (October 26, 2018): pp. 53–67. Accessed April 26, 2024. https://online-journals.org/index.php/i-joe/article/view/9303.