Lakhan Nagar, Pradeep Porwal, V. K. Gupta, and S. K. Tiwari. “A Tuberculosis Mathematical Model With Infected Population and Vaccination”. International Journal of Mathematics And Its Applications, vol. 5, no. 4 - F, Dec. 2017, pp. 939-43, https://ijmaa.in/index.php/ijmaa/article/view/1356.