Indah Rahmadhania, & Didik Khusnul Arif. (2020). Kontrol Optimal pada Model Penyebaran Virus Influenza Tipe A H1N1 dengan Menggunakan Prinsip Minumum Pontryagin. Limits: Journal of Mathematics and Its Applications, 17(1), 67–81. Retrieved from https://journal.its.ac.id/index.php/limits/article/view/5437