Ja’afar, A., G. Markarian, A. Isa, N. A. Ali, and M. Abd Aziz. “Enhanced Integrated Indoor Positioning Algorithm Utilising Wi-Fi Fingerprint Technique”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 4, Dec. 2017, pp. 123-9, https://jtec.utem.edu.my/jtec/article/view/2440.