Pakdeekaew, Aphisik, Krawee Treeamnuk, Tawarat Treeamnuk, and Nuttapong Wongbubpa. 2023. “Application of pulse width modulation technique in air humidity control system”. Agriculture and Natural Resources 57 (2). Bangkok, Thailand:321–330. https://li01.tci-thaijo.org/index.php/anres/article/view/259091.