Suwit Kiravittaya. (2020) Fitting the Evolution of COVID-19 Cases of China and Thailand by Applying Piecewise Linear Approximation of Compartmental Model Parameters. <i>Naresuan University Journal: Science and Technology</i>, <i>28</i>(4), 91-101.Suwit Kiravittaya. "Fitting the Evolution of COVID-19 Cases of China and Thailand by Applying Piecewise Linear Approximation of Compartmental Model Parameters". Naresuan University Journal: Science and Technology 28 (2020):91-101.Suwit Kiravittaya. Fitting the Evolution of COVID-19 Cases of China and Thailand by Applying Piecewise Linear Approximation of Compartmental Model Parameters. Naresuan University Graduate School:ม.ป.ท. 2020.