Heizlan Muhammad, Paian Sianturi, and Endar H. Nugrahani. “Dynamical System of Tuberculosis Considering Lost Sight Compartment”. International Journal of Engineering and Management Research 9, no. 3 (June 29, 2019): 1-6. Accessed September 20, 2021. https://www.ijemr.net/ojs/index.php/ojs/article/view/75.