Pakdeekaew, Aphisik, Krawee Treeamnuk, Tawarat Treeamnuk, and Nuttapong Wongbubpa. “Application of pulse width modulation technique in air humidity control system”. Agriculture and Natural Resources 57, no. 2 (April 30, 2023): 321–330. accessed December 6, 2025. https://li01.tci-thaijo.org/index.php/anres/article/view/259091.