Sunthornwat, Rapin, and Yupaporn Areepong. “Predictive Models for the Number of Cumulative Cases for Spreading Coronavirus Disease 2019 in the World”. Engineering and Applied Science Research 48, no. 4 (June 15, 2021): 432–445. Accessed May 2, 2024. https://ph01.tci-thaijo.org/index.php/easr/article/view/241789.