Pakdeekaew, A., K. Treeamnuk, T. Treeamnuk, and N. Wongbubpa. “Application of pulse width modulation technique in air humidity control system”. Agriculture and Natural Resources, vol. 57, no. 2, Apr. 2023, pp. 321–330, https://li01.tci-thaijo.org/index.php/anres/article/view/259091.