Rangkuti, Yulita Molliq, and Marlina Setia Sinaga. “APPROXIMATE SOLUTION OF VACCINATION, SUSCEPTIBLE, EXPOSED, INFECTED, RECOVERED (VSEIR) MODEL OF TUBERCULOSIS IN NORTH SUMATERA INDONESIA”. Malaysian Journal of Science 34, no. 2 (December 31, 2015): 185–191. Accessed November 25, 2024. https://ejournal.um.edu.my/index.php/MJS/article/view/6566.