HIKMAH, N. Analisis Titik Ekuilibrium Model Epidemi Sir dengan Efek Demografi. Beta: Jurnal Tadris Matematika, [S. l.], v. 4, n. 1, p. 61–67, 2011. Disponível em: https://jurnalbeta.ac.id/index.php/betaJTM/article/view/87. Acesso em: 23 jul. 2026.