Ramadhani, A., D. Mahayana, and M. F. Abbas. “Lyapunov Stability Analysis and Simulation of SIR Modelling for COVID-19 Dynamics in Indonesia”. ITB Graduate School Conference, vol. 2, no. 1, Nov. 2022, pp. 343-55, https://gcs.itb.ac.id/proceeding-igsc/index.php/igsc/article/view/94.