Hakim, Lukman. “Dinamika Solusi Dan Kontrol Optimal Model Penyakit ISPA Di Kota Malang”. Limits: Journal of Mathematics and Its Applications 22, no. 3 (November 20, 2025): 197–216. Accessed January 24, 2026. https://journal.its.ac.id/index.php/limits/article/view/4204.