Suriani, Suriani, Syamsuddin Toaha, and Kasbawati Kasbawati. “MSEICR Fractional Order Mathematical Model of The Spread Hepatitis B”. Jurnal Matematika, Statistika dan Komputasi 17, no. 2 (December 23, 2020): 314-324. Accessed April 6, 2025. http://334012.libg.asia/index.php/jmsk/article/view/10994.