Musafir, Raqqasyi Rahmatullah, Agus Suryanto, and Isnani Darti. “Dynamics of COVID-19 Epidemic Model With Asymptomatic Infection, Quarantine, Protection and Vaccination”. Communication in Biomathematical Sciences 4, no. 2 (December 31, 2021): 106-124. Accessed October 31, 2025. https://journals.itb.ac.id/index.php/cbms/article/view/17370.