Emmanuel, S., S. Sathasivam, N. H. I. Hasmadi, N. H. Mohamad Nasir, and M. Velavan. “Estimating Upsurge of Hiv Cases in Malaysia by Using Heun’s Predictor-Corrector Method”. Journal of Science and Mathematics Letters, vol. 12, no. 1, Jan. 2024, pp. 43-52, doi:10.37134/jsml.vol12.1.6.2024.