Akbar, Fadilah, Ahmad Hanif Asyhar, Ahmad Lubab, Abdulloh Hamid, Moh. Hafiyusholeh, Dian Candra Rini Novitasari, Ahmad Zaenal Arifin, and Muhammad Fahrur Rozi. 2024. “Vaccine Effectiveness Impact on the COVID-19 Dynamics Spread Outbreak Using Improved SEIR Mathematical Epidemic Model”. Thai Journal of Mathematics 22 (3):485–502. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1504.