Sukchana, T., and N. Siriwattananon. “Development of a Sami-Automatic Phyllanthus Emblica Tapping Machine with Pneumatic System”. Frontiers in Engineering Innovation Research, vol. 19, no. 1, June 2021, pp. 25-33, https://ph01.tci-thaijo.org/index.php/jermutt/article/view/243798.