Ayup Jehmi @ Ayub, Mohd Nawawi, and Zuhairiah Zainal Abidin. “IoT-Based Health Monitoring and Tracking System for Self-Quarantine of Covid-19 Patients”. Evolution in Electrical and Electronic Engineering, vol. 3, no. 2, Nov. 2022, pp. 89-99, https://publisher.uthm.edu.my/periodicals/index.php/eeee/article/view/8471.