Kumboon, Amnouy, Worapot Sirirak, and Reungruthai Sirirak. 2019. “A Study of the Effect of Mixture Material in Coconut Shell Charcoal Briquette on Mechanical and Thermal Property”. Thai Industrial Engineering Network Journal 5 (2):67-75. https://ph02.tci-thaijo.org/index.php/ienj/article/view/201377.