Log Monitoring System using Quick Response (QR) Code: A State University’s COVID – 19 Contact Tracing System. Int. J. Inform. Inf. Sys. and Comp. Eng. [Internet]. 2022 Oct. 18 [cited 2025 Apr. 21];3(2):209-18. Available from: https://ojs.unikom.ac.id/index.php/injiiscom/article/view/9037