Aini Fitriyah. “Rumus Bilangan Reproduksi Dasar Covid-19 Dengan Adanya Vaksinasi Dosis 1 Dan 2”. Limits: Journal of Mathematics and Its Applications 19, no. 1 (May 15, 2022): 87–100. Accessed March 29, 2026. https://journal.its.ac.id/index.php/limits/article/view/5373.