Soliman, B. W. M., and A. C. F. Bueno. “MODELLING THE SPREAD OF PNEUMONIA IN THE PHILIPPINES USING SUSCEPTIBLE-INFECTED-RECOVERED (SIR) MODEL WITH DEMOGRAPHIC CHANGES”. Journal of Technology Management and Business, vol. 5, no. 1, Feb. 2018, https://publisher.uthm.edu.my/ojs/index.php/jtmb/article/view/2242.