1.
. W, Fitriani U, . K, Utomo RH, Triyana E. Maximum Principle for Optimal Control of COVID-19 Spread. ijmcr [Internet]. 23Jun.2022 [cited 15Mar.2025];10(6):2744-9. Available from: http://mail.ijmcr.in/index.php/ijmcr/article/view/425