Mungkasi S. Improved Variational Iteration Solutions to the SIR Model of Dengue Fever Disease for the Case of South Sulawesi. J. Math. Fund. Sci. [Internet]. 2020Dec.31 [cited 2025Oct.14];52(3):297-311. Available from: https://journals.itb.ac.id/index.php/jmfs/article/view/14041