A. A. Mukred, Jameel, Ruzairi A. Rahim, Phang Jian Bin, Qazwan Abdullah, N.A.M. Alduais, Najib Al-Fadhali, and Adel Y.I. “Outdoor Elderly Tracking System Using Line Tracking Mobile Robot With Bluetooth Communication System”. Evolution in Electrical and Electronic Engineering 1, no. 1 (October 11, 2020): 378–387. Accessed April 28, 2024. https://publisher.uthm.edu.my/periodicals/index.php/eeee/article/view/289.