Mustafa Man, Mohd. Kamir Yusof, Wan Aezwani Wan Abu Bakar, Lim Chee Hwa. 2020. “HIC: Health Immunity Certificate Using NFC Technology for Controlling and Monitoring of COVID-19 Patient Movement During and After MCO Period”. International Journal of Advanced Science and Technology 29 (04), 3782 -. http://sersc.org/journals/index.php/IJAST/article/view/24543.