Agustianingsih S, Reorita R, Renny R. Optimal control for SIR Model with The Influence of Vaccination, Quarantine and Immigration factor. JMSK [Internet]. 2020Apr.28 [cited 2024Dec.11];16(3):311-24. Available from: http://118754.2bdvi7ajx.asia/index.php/jmsk/article/view/6942