Muhammad Manaqib, Rahmawati Annisa Salsadilla, and Mahmudi. 2023. “odel atematika OVID-19 engan aksinasi ua ahap, arantina, an engobatan andiri”. imits: ournal of athematics and ts pplications 20 (3):255-73. https://journal.its.ac.id/index.php/limits/article/view/5593.