Kaisar MMM, Kristin H, Widowati TA, Rachel C, Hengestu A, Surja SS, Ali S. Tracing COVID-19 cluster during offline learning in the new era of pandemic. jcse [Internet]. 2024 Feb. 28 [cited 2024 Nov. 14];5(1):155-62. Available from: https://ejournal.umm.ac.id/index.php/jcse/article/view/27945