Muhammad Manaqib, Rahmawati Annisa Salsadilla, and Mahmudi. “odel atematika OVID-19 engan aksinasi ua ahap, arantina, an engobatan andiri”. imits: ournal of athematics and ts pplications, vol. 20, no. 3, Nov. 2023, pp. 255-73, https://journal.its.ac.id/index.php/limits/article/view/5593.