HIDAYATI, Noer; SARI, Eminugroho Ratna; WARYANTO, Nur Hadi. Mathematical model of cholera spread based on SIR: Optimal control. PYTHAGORAS Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 16, n. 1, p. 70–83, 2021. DOI: 10.21831/pg.v16i1.35729. Disponível em: https://journal.uny.ac.id/index.php/pythagoras/article/view/35729. Acesso em: 19 jul. 2025.