Emmanuel, Sabastine, Saratha Sathasivam, Nur Haziqah Izni Hasmadi, Nur Hakimah Mohamad Nasir, and Muraly Velavan. 2024. “Estimating Upsurge of Hiv Cases in Malaysia by Using Heun’s Predictor-Corrector Method”. Journal of Science and Mathematics Letters 12 (1):43-52. https://doi.org/10.37134/jsml.vol12.1.6.2024.